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Hooper D, Plant K. Leptonic Model for Neutrino Emission from Active Galactic Nuclei. PHYSICAL REVIEW LETTERS 2023; 131:231001. [PMID: 38134788 DOI: 10.1103/physrevlett.131.231001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 08/08/2023] [Accepted: 11/09/2023] [Indexed: 12/24/2023]
Abstract
It is often stated that the observation of high-energy neutrinos from an astrophysical source would constitute indisputable proof for the acceleration of hadronic cosmic rays. Here, we point out that there exists a purely leptonic mechanism to produce TeV-scale neutrinos in astrophysical environments. In particular, very high-energy synchrotron photons can scatter with x rays, exceeding the threshold for muon-antimuon pair production. When these muons decay, they produce neutrinos without any cosmic-ray protons or nuclei being involved. In order for this mechanism to be efficient, the source in question must produce very high-energy photons which interact in an environment that is dominated by keV-scale radiation. We find that such a source could potentially generate an observable neutrino flux through muon pair production for reasonable choices of physical parameters.
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Affiliation(s)
- Dan Hooper
- Fermi National Accelerator Laboratory, Theoretical Astrophysics Department, Batavia, Illinois, USA
- University of Chicago, Department of Astronomy & Astrophysics, Chicago, Illinois, USA
- University of Chicago, Kavli Institute for Cosmological Physics, Chicago, Illinois, USA
| | - Kathryn Plant
- California Institute of Technology, Department of Astronomy, Pasadena, California, USA
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2
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Abbasi RU, Allen MG, Arimura R, Belz JW, Bergman DR, Blake SA, Shin BK, Buckland IJ, Cheon BG, Fujii T, Fujisue K, Fujita K, Fukushima M, Furlich GD, Gerber ZR, Globus N, Hibino K, Higuchi R, Honda K, Ikeda D, Ito H, Iwasaki A, Jeong S, Jeong HM, Jui CH, Kadota K, Kakimoto F, Kalashev OE, Kasahara K, Kawata K, Kharuk I, Kido E, Kim SW, Kim HB, Kim JH, Kim JH, Komae I, Kubota Y, Kuznetsov MY, Lee KH, Lubsandorzhiev BK, Lundquist JP, Matthews JN, Nagataki S, Nakamura T, Nakazawa A, Nonaka T, Ogio S, Ono M, Oshima H, Park IH, Potts M, Pshirkov S, Remington JR, Rodriguez DC, Rott C, Rubtsov GI, Ryu D, Sagawa H, Sakaki N, Sako T, Sakurai N, Shin H, Smith JD, Sokolsky P, Stokes BT, Stroman TS, Takahashi K, Takeda M, Taketa A, Tameda Y, Thomas S, Thomson GB, Tinyakov PG, Tkachev I, Tomida T, Troitsky SV, Tsunesada Y, Udo S, Urban FR, Wong T, Yamazaki K, Yuma Y, Zhezher YV, Zundel Z. An extremely energetic cosmic ray observed by a surface detector array. Science 2023; 382:903-907. [PMID: 37995237 DOI: 10.1126/science.abo5095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 10/19/2023] [Indexed: 11/25/2023]
Abstract
Cosmic rays are energetic charged particles from extraterrestrial sources, with the highest-energy events thought to come from extragalactic sources. Their arrival is infrequent, so detection requires instruments with large collecting areas. In this work, we report the detection of an extremely energetic particle recorded by the surface detector array of the Telescope Array experiment. We calculate the particle's energy as [Formula: see text] (~40 joules). Its arrival direction points back to a void in the large-scale structure of the Universe. Possible explanations include a large deflection by the foreground magnetic field, an unidentified source in the local extragalactic neighborhood, or an incomplete knowledge of particle physics.
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Affiliation(s)
- R U Abbasi
- Physics Department, Loyola University Chicago, Chicago, IL, USA
| | - M G Allen
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - R Arimura
- Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - J W Belz
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - D R Bergman
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - S A Blake
- Stellar Science, Albuquerque, NM, USA
| | - B K Shin
- Department of Physics, Ulsan National Institute of Science and Technology, 44919, Ulsan, Korea
| | - I J Buckland
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - B G Cheon
- Department of Physics and The Research Institute of Natural Science, Hanyang University, Seongdong-gu, Seoul, Korea
| | - T Fujii
- Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
- Hakubi Center for Advanced Research and Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
- Nambu Yoichiro Institute of Theoretical and Experimental Physics, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - K Fujisue
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - K Fujita
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - M Fukushima
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - G D Furlich
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - Z R Gerber
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - N Globus
- Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
| | - K Hibino
- Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - R Higuchi
- Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
| | - K Honda
- University of Yamanashi, Kofu, 400-8510, Japan
| | - D Ikeda
- Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - H Ito
- Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
| | - A Iwasaki
- Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - S Jeong
- Department of Physics, SungKyunKwan University, Jang-an-gu, Suwon 16419, Korea
| | - H M Jeong
- Department of Physics, SungKyunKwan University, Jang-an-gu, Suwon 16419, Korea
| | - C H Jui
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - K Kadota
- Department of Natural Sciences, Tokyo City University, Setagaya-ku, Tokyo 158-8557, Japan
| | - F Kakimoto
- Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - O E Kalashev
- Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312, Russia
| | - K Kasahara
- Shibauta Institute of Technology and Sicence, Fukasaku 307, Minuma-ku, Saitama, Japan
| | - K Kawata
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - I Kharuk
- Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312, Russia
| | - E Kido
- Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
| | - S W Kim
- Department of Physics, SungKyunKwan University, Jang-an-gu, Suwon 16419, Korea
| | - H B Kim
- Department of Physics and The Research Institute of Natural Science, Hanyang University, Seongdong-gu, Seoul, Korea
| | - J H Kim
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - J H Kim
- Physics Division, Argonne National Laboratory, Lemont, IL, USA
| | - I Komae
- Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - Y Kubota
- Academic Assembly School of Science and Technology Institute of Engineering, Shinshu University, Nagano, Nagano, 380-8553, Japan
| | - M Y Kuznetsov
- Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312, Russia
| | - K H Lee
- Department of Physics, SungKyunKwan University, Jang-an-gu, Suwon 16419, Korea
| | - B K Lubsandorzhiev
- Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312, Russia
| | - J P Lundquist
- Center for Astrophysics and Cosmology, University of Nova Gorica, Nova Gorica, Slovenia
| | - J N Matthews
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - S Nagataki
- Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
| | - T Nakamura
- Academic Assembly School of Science and Technology Institute of Engineering, Shinshu University, Nagano, Nagano, 380-8553, Japan
| | - A Nakazawa
- Academic Assembly School of Science and Technology Institute of Engineering, Shinshu University, Nagano, Nagano, 380-8553, Japan
| | - T Nonaka
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - S Ogio
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - M Ono
- Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
- Institute of Astronomy and Astrophysics, Academia Sinica, Taipei 10617, Taiwan
| | - H Oshima
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - I H Park
- Department of Physics, SungKyunKwan University, Jang-an-gu, Suwon 16419, Korea
| | - M Potts
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - S Pshirkov
- Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312, Russia
| | - J R Remington
- NASA Marshall Space Flight Center, Martin Road, Huntsville, AL, USA
| | - D C Rodriguez
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
- Integrated Support Center for Nuclear Nonproliferation and Nuclear Security, Japan Atomic Energy Agency, Tokai-mura, Ibaraki 319-1195, Japan
| | - C Rott
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
- Department of Physics, SungKyunKwan University, Jang-an-gu, Suwon 16419, Korea
| | - G I Rubtsov
- Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312, Russia
| | - D Ryu
- Department of Physics, Ulsan National Institute of Science and Technology, 44919, Ulsan, Korea
| | - H Sagawa
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - N Sakaki
- Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
| | - T Sako
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - N Sakurai
- Faculty of Design Technology, 3-1-1 Nakagaito, Daito City, Osaka, Japan
| | - H Shin
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - J D Smith
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - P Sokolsky
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - B T Stokes
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - T S Stroman
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - K Takahashi
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - M Takeda
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8582, Japan
| | - A Taketa
- Earthquake Research Institute, University of Tokyo, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Y Tameda
- Department of Engineering Science, Faculty of Engineering, Osaka Electro-Communication University, Neyagawa-shi, Osaka 572-8530, Japan
| | - S Thomas
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - G B Thomson
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - P G Tinyakov
- Universite Libre de Bruxelles, bvd du Triomphe CP225, Brussels, Belgium
| | - I Tkachev
- Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312, Russia
| | - T Tomida
- Academic Assembly School of Science and Technology Institute of Engineering, Shinshu University, Nagano, Nagano, 380-8553, Japan
| | - S V Troitsky
- Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312, Russia
| | - Y Tsunesada
- Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
- Nambu Yoichiro Institute of Theoretical and Experimental Physics, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - S Udo
- Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - F R Urban
- The Central European Institute for Cosmology and Fundamental Physics, Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Prague, Czech Republic
| | - T Wong
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
| | - K Yamazaki
- College of Engineering, Chubu University, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan
| | - Y Yuma
- Academic Assembly School of Science and Technology Institute of Engineering, Shinshu University, Nagano, Nagano, 380-8553, Japan
| | - Y V Zhezher
- Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312, Russia
| | - Z Zundel
- High Energy Astrophysics Institute and Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA
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3
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Abbasi R, Ackermann M, Adams J, Aguilar JA, Ahlers M, Ahrens M, Alameddine JM, Alves AA, Amin NM, Andeen K, Anderson T, Anton G, Argüelles C, Ashida Y, Athanasiadou S, Axani S, Bai X, Balagopal V A, Barwick SW, Basu V, Baur S, Bay R, Beatty JJ, Becker KH, Tjus JB, Beise J, Bellenghi C, Benda S, BenZvi S, Berley D, Bernardini E, Besson DZ, Binder G, Bindig D, Blaufuss E, Blot S, Boddenberg M, Bontempo F, Book JY, Borowka J, Böser S, Botner O, Böttcher J, Bourbeau E, Bradascio F, Braun J, Brinson B, Bron S, Brostean-Kaiser J, Burley RT, Busse RS, Campana MA, Carnie-Bronca EG, Chen C, Chen Z, Chirkin D, Choi K, Clark BA, Clark K, Classen L, Coleman A, Collin GH, Connolly A, Conrad JM, Coppin P, Correa P, Cowen DF, Cross R, Dappen C, Dave P, De Clercq C, DeLaunay JJ, López DD, Dembinski H, Deoskar K, Desai A, Desiati P, de Vries KD, de Wasseige G, DeYoung T, Diaz A, Díaz-Vélez JC, Dittmer M, Dujmovic H, Dunkman M, DuVernois MA, Ehrhardt T, Eller P, Engel R, Erpenbeck H, Evans J, Evenson PA, Fan KL, Fazely AR, Fedynitch A, Feigl N, Fiedlschuster S, Fienberg AT, Finley C, Fischer L, Fox D, Franckowiak A, Friedman E, Fritz A, Fürst P, Gaisser TK, Gallagher J, Ganster E, Garcia A, Garrappa S, Gerhardt L, Ghadimi A, Glaser C, Glauch T, Glüsenkamp T, Goehlke N, Goldschmidt A, Gonzalez JG, Goswami S, Grant D, Grégoire T, Griswold S, Günther C, Gutjahr P, Haack C, Hallgren A, Halliday R, Halve L, Halzen F, Minh MH, Hanson K, Hardin J, Harnisch AA, Haungs A, Helbing K, Henningsen F, Hettinger EC, Hickford S, Hignight J, Hill C, Hill GC, Hoffman KD, Hoshina K, Hou W, Huang F, Huber M, Huber T, Hultqvist K, Hünnefeld M, Hussain R, Hymon K, In S, Iovine N, Ishihara A, Jansson M, Japaridze GS, Jeong M, Jin M, Jones BJP, Kang D, Kang W, Kang X, Kappes A, Kappesser D, Kardum L, Karg T, Karl M, Karle A, Katz U, Kauer M, Kellermann M, Kelley JL, Kheirandish A, Kin K, Kiryluk J, Klein SR, Kochocki A, Koirala R, Kolanoski H, Kontrimas T, Köpke L, Kopper C, Kopper S, Koskinen DJ, Koundal P, Kovacevich M, Kowalski M, Kozynets T, Krupczak E, Kun E, Kurahashi N, Lad N, Gualda CL, Lanfranchi JL, Larson MJ, Lauber F, Lazar JP, Lee JW, Leonard K, Leszczyńska A, Li Y, Lincetto M, Liu QR, Liubarska M, Lohfink E, Mariscal CJL, Lu L, Lucarelli F, Ludwig A, Luszczak W, Lyu Y, Ma WY, Madsen J, Mahn KBM, Makino Y, Mancina S, Mariş IC, Martinez-Soler I, Maruyama R, McHale S, McElroy T, McNally F, Mead JV, Meagher K, Mechbal S, Medina A, Meier M, Meighen-Berger S, Merckx Y, Micallef J, Mockler D, Montaruli T, Moore RW, Morik K, Morse R, Moulai M, Mukherjee T, Naab R, Nagai R, Nahnhauer R, Naumann U, Necker J, Nguyen LV, Niederhausen H, Nisa MU, Nowicki SC, Nygren D, Pollmann AO, Oehler M, Oeyen B, Olivas A, O'Sullivan E, Pandya H, Pankova DV, Park N, Parker GK, Paudel EN, Paul L, de Los Heros CP, Peters L, Peterson J, Philippen S, Pieper S, Pizzuto A, Plum M, Popovych Y, Porcelli A, Rodriguez MP, Pries B, Przybylski GT, Raab C, Rack-Helleis J, Raissi A, Rameez M, Rawlins K, Rea IC, Rechav Z, Rehman A, Reichherzer P, Reimann R, Renzi G, Resconi E, Reusch S, Rhode W, Richman M, Riedel B, Roberts EJ, Robertson S, Roellinghoff G, Rongen M, Rott C, Ruhe T, Ryckbosch D, Cantu DR, Safa I, Saffer J, Salazar-Gallegos D, Sampathkumar P, Herrera SES, Sandrock A, Santander M, Sarkar S, Sarkar S, Satalecka K, Schaufel M, Schieler H, Schindler S, Schmidt T, Schneider A, Schneider J, Schröder FG, Schumacher L, Schwefer G, Sclafani S, Seckel D, Seunarine S, Sharma A, Shefali S, Shimizu N, Silva M, Skrzypek B, Smithers B, Snihur R, Soedingrekso J, Sogaard A, Soldin D, Spannfellner C, Spiczak GM, Spiering C, Stamatikos M, Stanev T, Stein R, Stettner J, Stezelberger T, Stokstad B, Stürwald T, Stuttard T, Sullivan GW, Taboada I, Ter-Antonyan S, Thwaites J, Tilav S, Tischbein F, Tollefson K, Tönnis C, Toscano S, Tosi D, Trettin A, Tselengidou M, Tung CF, Turcati A, Turcotte R, Turley CF, Twagirayezu JP, Ty B, Elorrieta MAU, Valtonen-Mattila N, Vandenbroucke J, van Eijndhoven N, Vannerom D, van Santen J, Veitch-Michaelis J, Verpoest S, Walck C, Wang W, Watson TB, Weaver C, Weigel P, Weindl A, Weiss MJ, Weldert J, Wendt C, Werthebach J, Weyrauch M, Whitehorn N, Wiebusch CH, Willey N, Williams DR, Wolf M, Wrede G, Wulff J, Xu XW, Yanez JP, Yildizci E, Yoshida S, Yu S, Yuan T, Zhang Z, Zhelnin P. Observation of high-energy neutrinos from the Galactic plane. Science 2023; 380:1338-1343. [PMID: 37384687 DOI: 10.1126/science.adc9818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 05/04/2023] [Indexed: 07/01/2023]
Abstract
The origin of high-energy cosmic rays, atomic nuclei that continuously impact Earth's atmosphere, is unknown. Because of deflection by interstellar magnetic fields, cosmic rays produced within the Milky Way arrive at Earth from random directions. However, cosmic rays interact with matter near their sources and during propagation, which produces high-energy neutrinos. We searched for neutrino emission using machine learning techniques applied to 10 years of data from the IceCube Neutrino Observatory. By comparing diffuse emission models to a background-only hypothesis, we identified neutrino emission from the Galactic plane at the 4.5σ level of significance. The signal is consistent with diffuse emission of neutrinos from the Milky Way but could also arise from a population of unresolved point sources.
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Affiliation(s)
- R Abbasi
- Department of Physics, Loyola University Chicago, Chicago, IL 60660, USA
| | - M Ackermann
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - J Adams
- Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand
| | - J A Aguilar
- Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium
| | - M Ahlers
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - M Ahrens
- Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm, Sweden
| | - J M Alameddine
- Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany
| | - A A Alves
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - N M Amin
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - K Andeen
- Department of Physics, Marquette University, Milwaukee, WI, 53201, USA
| | - T Anderson
- Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
| | - G Anton
- Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
| | - C Argüelles
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA 02138, USA
| | - Y Ashida
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - S Athanasiadou
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - S Axani
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - X Bai
- Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
| | - A Balagopal V
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - S W Barwick
- Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA
| | - V Basu
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - S Baur
- Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium
| | - R Bay
- Department of Physics, University of California, Berkeley, CA 94720, USA
| | - J J Beatty
- Department of Astronomy, Ohio State University, Columbus, OH 43210, USA
- Department of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA
| | - K-H Becker
- Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany
| | - J Becker Tjus
- Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - J Beise
- Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
| | - C Bellenghi
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - S Benda
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - S BenZvi
- Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA
| | - D Berley
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - E Bernardini
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
- Università di Padova, I-35131 Padova, Italy
| | - D Z Besson
- Department of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA
| | - G Binder
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - D Bindig
- Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany
| | - E Blaufuss
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - S Blot
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - M Boddenberg
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - F Bontempo
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - J Y Book
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA 02138, USA
| | - J Borowka
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - S Böser
- Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany
| | - O Botner
- Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
| | - J Böttcher
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - E Bourbeau
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - F Bradascio
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - J Braun
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - B Brinson
- School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - S Bron
- Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland
| | | | - R T Burley
- Department of Physics, University of Adelaide, Adelaide, 5005, Australia
| | - R S Busse
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany
| | - M A Campana
- Department of Physics, Drexel University, Philadelphia, PA 19104, USA
| | - E G Carnie-Bronca
- Department of Physics, University of Adelaide, Adelaide, 5005, Australia
| | - C Chen
- School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Z Chen
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA
| | - D Chirkin
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - K Choi
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - B A Clark
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - K Clark
- Department of Physics, Engineering Physics, and Astronomy, Queen's University, Kingston, ON K7L 3N6, Canada
| | - L Classen
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany
| | - A Coleman
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - G H Collin
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - A Connolly
- Department of Astronomy, Ohio State University, Columbus, OH 43210, USA
- Department of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA
| | - J M Conrad
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - P Coppin
- Vrije Universiteit Brussel, Dienst Elementary Particles, B-1050 Brussels, Belgium
| | - P Correa
- Vrije Universiteit Brussel, Dienst Elementary Particles, B-1050 Brussels, Belgium
| | - D F Cowen
- Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - R Cross
- Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA
| | - C Dappen
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - P Dave
- School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - C De Clercq
- Vrije Universiteit Brussel, Dienst Elementary Particles, B-1050 Brussels, Belgium
| | - J J DeLaunay
- Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA
| | - D Delgado López
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA 02138, USA
| | - H Dembinski
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - K Deoskar
- Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm, Sweden
| | - A Desai
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - P Desiati
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - K D de Vries
- Vrije Universiteit Brussel, Dienst Elementary Particles, B-1050 Brussels, Belgium
| | - G de Wasseige
- Centre for Cosmology, Particle Physics and Phenomenology, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | - T DeYoung
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - A Diaz
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - J C Díaz-Vélez
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - M Dittmer
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany
| | - H Dujmovic
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - M Dunkman
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - M A DuVernois
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - T Ehrhardt
- Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany
| | - P Eller
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - R Engel
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
- Karlsruhe Institute of Technology, Institute of Experimental Particle Physics, D-76021 Karlsruhe, Germany
| | - H Erpenbeck
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - J Evans
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - P A Evenson
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - K L Fan
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - A R Fazely
- Department of Physics, Southern University, Baton Rouge, LA 70813, USA
| | - A Fedynitch
- Institute of Physics, Academia Sinica, Taipei, 11529, Taiwan
| | - N Feigl
- Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany
| | - S Fiedlschuster
- Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
| | - A T Fienberg
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - C Finley
- Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm, Sweden
| | - L Fischer
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - D Fox
- Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA
| | - A Franckowiak
- Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - E Friedman
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - A Fritz
- Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany
| | - P Fürst
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - T K Gaisser
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - J Gallagher
- Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - E Ganster
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - A Garcia
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA 02138, USA
| | - S Garrappa
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - L Gerhardt
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - A Ghadimi
- Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA
| | - C Glaser
- Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
| | - T Glauch
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - T Glüsenkamp
- Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
| | - N Goehlke
- Karlsruhe Institute of Technology, Institute of Experimental Particle Physics, D-76021 Karlsruhe, Germany
| | - A Goldschmidt
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - J G Gonzalez
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - S Goswami
- Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA
| | - D Grant
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - T Grégoire
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - S Griswold
- Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA
| | - C Günther
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - P Gutjahr
- Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany
| | - C Haack
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - A Hallgren
- Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
| | - R Halliday
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - L Halve
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - F Halzen
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - M Ha Minh
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - K Hanson
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - J Hardin
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - A A Harnisch
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - A Haungs
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - K Helbing
- Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany
| | - F Henningsen
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - E C Hettinger
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - S Hickford
- Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany
| | - J Hignight
- Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2E1 Canada
| | - C Hill
- Department of Physics and The International Center for Hadron Astrophysics, Chiba University, Chiba 263-8522, Japan
| | - G C Hill
- Department of Physics, University of Adelaide, Adelaide, 5005, Australia
| | - K D Hoffman
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - K Hoshina
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
- Earthquake Research Institute, University of Tokyo, Bunkyo, Tokyo 113-0032, Japan
| | - W Hou
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - F Huang
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - M Huber
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - T Huber
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - K Hultqvist
- Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm, Sweden
| | - M Hünnefeld
- Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany
| | - R Hussain
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - K Hymon
- Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany
| | - S In
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - N Iovine
- Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium
| | - A Ishihara
- Department of Physics and The International Center for Hadron Astrophysics, Chiba University, Chiba 263-8522, Japan
| | - M Jansson
- Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm, Sweden
| | - G S Japaridze
- The Center for Theoretical Studies of Physical Systems, Clark-Atlanta University, Atlanta, GA 30314, USA
| | - M Jeong
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - M Jin
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA 02138, USA
| | - B J P Jones
- Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA
| | - D Kang
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - W Kang
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - X Kang
- Department of Physics, Drexel University, Philadelphia, PA 19104, USA
| | - A Kappes
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany
| | - D Kappesser
- Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany
| | - L Kardum
- Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany
| | - T Karg
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - M Karl
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - A Karle
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - U Katz
- Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
| | - M Kauer
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - M Kellermann
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - J L Kelley
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - A Kheirandish
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - K Kin
- Department of Physics and The International Center for Hadron Astrophysics, Chiba University, Chiba 263-8522, Japan
| | - J Kiryluk
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA
| | - S R Klein
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - A Kochocki
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - R Koirala
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - H Kolanoski
- Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany
| | - T Kontrimas
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - L Köpke
- Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany
| | - C Kopper
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - S Kopper
- Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA
| | - D J Koskinen
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - P Koundal
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - M Kovacevich
- Department of Physics, Drexel University, Philadelphia, PA 19104, USA
| | - M Kowalski
- Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - T Kozynets
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - E Krupczak
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - E Kun
- Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - N Kurahashi
- Department of Physics, Drexel University, Philadelphia, PA 19104, USA
| | - N Lad
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | | | - J L Lanfranchi
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - M J Larson
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - F Lauber
- Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany
| | - J P Lazar
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA 02138, USA
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - J W Lee
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - K Leonard
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - A Leszczyńska
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - Y Li
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - M Lincetto
- Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - Q R Liu
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - M Liubarska
- Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2E1 Canada
| | - E Lohfink
- Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany
| | - C J Lozano Mariscal
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany
| | - L Lu
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - F Lucarelli
- Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland
| | - A Ludwig
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - W Luszczak
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Y Lyu
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - W Y Ma
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - J Madsen
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - K B M Mahn
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - Y Makino
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - S Mancina
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - I C Mariş
- Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium
| | - I Martinez-Soler
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA 02138, USA
| | - R Maruyama
- Department of Physics, Yale University, New Haven, CT 06520, USA
| | - S McHale
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - T McElroy
- Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2E1 Canada
| | - F McNally
- Department of Physics, Mercer University, Macon, GA 31207-0001, USA
| | - J V Mead
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - K Meagher
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - S Mechbal
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - A Medina
- Department of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA
| | - M Meier
- Department of Physics and The International Center for Hadron Astrophysics, Chiba University, Chiba 263-8522, Japan
| | - S Meighen-Berger
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - Y Merckx
- Vrije Universiteit Brussel, Dienst Elementary Particles, B-1050 Brussels, Belgium
| | - J Micallef
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - D Mockler
- Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium
| | - T Montaruli
- Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland
| | - R W Moore
- Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2E1 Canada
| | - K Morik
- Computer Science Faculty, TU Dortmund University, D-44221 Dortmund, Germany
| | - R Morse
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - M Moulai
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - T Mukherjee
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - R Naab
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - R Nagai
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - R Nahnhauer
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - U Naumann
- Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany
| | - J Necker
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - L V Nguyen
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - H Niederhausen
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - M U Nisa
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - S C Nowicki
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - D Nygren
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | | | - M Oehler
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - B Oeyen
- Department of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium
| | - A Olivas
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - E O'Sullivan
- Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
| | - H Pandya
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - D V Pankova
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - N Park
- Department of Physics, Engineering Physics, and Astronomy, Queen's University, Kingston, ON K7L 3N6, Canada
| | - G K Parker
- Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA
| | - E N Paudel
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - L Paul
- Department of Physics, Marquette University, Milwaukee, WI, 53201, USA
| | - C Pérez de Los Heros
- Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
| | - L Peters
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - J Peterson
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - S Philippen
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - S Pieper
- Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany
| | - A Pizzuto
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - M Plum
- Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
| | - Y Popovych
- Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany
| | - A Porcelli
- Department of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium
| | - M Prado Rodriguez
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - B Pries
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - G T Przybylski
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - C Raab
- Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium
| | - J Rack-Helleis
- Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany
| | - A Raissi
- Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand
| | - M Rameez
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - K Rawlins
- Department of Physics and Astronomy, University of Alaska Anchorage, Anchorage, AK 99508, USA
| | - I C Rea
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - Z Rechav
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - A Rehman
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - P Reichherzer
- Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - R Reimann
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - G Renzi
- Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium
| | - E Resconi
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - S Reusch
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - W Rhode
- Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany
| | - M Richman
- Department of Physics, Drexel University, Philadelphia, PA 19104, USA
| | - B Riedel
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - E J Roberts
- Department of Physics, University of Adelaide, Adelaide, 5005, Australia
| | - S Robertson
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - G Roellinghoff
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - M Rongen
- Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany
| | - C Rott
- Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - T Ruhe
- Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany
| | - D Ryckbosch
- Department of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium
| | - D Rysewyk Cantu
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - I Safa
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA 02138, USA
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - J Saffer
- Karlsruhe Institute of Technology, Institute of Experimental Particle Physics, D-76021 Karlsruhe, Germany
| | - D Salazar-Gallegos
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - P Sampathkumar
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - S E Sanchez Herrera
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - A Sandrock
- Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany
| | - M Santander
- Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA
| | - S Sarkar
- Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2E1 Canada
| | - S Sarkar
- Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK
| | - K Satalecka
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - M Schaufel
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - H Schieler
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - S Schindler
- Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
| | - T Schmidt
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - A Schneider
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - J Schneider
- Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
| | - F G Schröder
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - L Schumacher
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - G Schwefer
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - S Sclafani
- Department of Physics, Drexel University, Philadelphia, PA 19104, USA
| | - D Seckel
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - S Seunarine
- Department of Physics, University of Wisconsin, River Falls, WI 54022, USA
| | - A Sharma
- Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
| | - S Shefali
- Karlsruhe Institute of Technology, Institute of Experimental Particle Physics, D-76021 Karlsruhe, Germany
| | - N Shimizu
- Department of Physics and The International Center for Hadron Astrophysics, Chiba University, Chiba 263-8522, Japan
| | - M Silva
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - B Skrzypek
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA 02138, USA
| | - B Smithers
- Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA
| | - R Snihur
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - J Soedingrekso
- Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany
| | - A Sogaard
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - D Soldin
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - C Spannfellner
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - G M Spiczak
- Department of Physics, University of Wisconsin, River Falls, WI 54022, USA
| | - C Spiering
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - M Stamatikos
- Department of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA
| | - T Stanev
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - R Stein
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - J Stettner
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - T Stezelberger
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - B Stokstad
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - T Stürwald
- Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany
| | - T Stuttard
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - G W Sullivan
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - I Taboada
- School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - S Ter-Antonyan
- Department of Physics, Southern University, Baton Rouge, LA 70813, USA
| | - J Thwaites
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - S Tilav
- Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
| | - F Tischbein
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - K Tollefson
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - C Tönnis
- Institute of Basic Science, Sungkyunkwan University, Suwon 16419, Korea
| | - S Toscano
- Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium
| | - D Tosi
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - A Trettin
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - M Tselengidou
- Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
| | - C F Tung
- School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - A Turcati
- Physik-department, Technische Universität München, D-85748 Garching, Germany
| | - R Turcotte
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - C F Turley
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - J P Twagirayezu
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - B Ty
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - M A Unland Elorrieta
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany
| | - N Valtonen-Mattila
- Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
| | - J Vandenbroucke
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - N van Eijndhoven
- Vrije Universiteit Brussel, Dienst Elementary Particles, B-1050 Brussels, Belgium
| | - D Vannerom
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - J van Santen
- Deutsches Elektronen-Synchrotron, D-15738 Zeuthen, Germany
| | - J Veitch-Michaelis
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - S Verpoest
- Department of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium
| | - C Walck
- Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm, Sweden
| | - W Wang
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - T B Watson
- Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA
| | - C Weaver
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - P Weigel
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - A Weindl
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - M J Weiss
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| | - J Weldert
- Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany
| | - C Wendt
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - J Werthebach
- Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany
| | - M Weyrauch
- Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany
| | - N Whitehorn
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - C H Wiebusch
- Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
| | - N Willey
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - D R Williams
- Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA
| | - M Wolf
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - G Wrede
- Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
| | - J Wulff
- Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - X W Xu
- Department of Physics, Southern University, Baton Rouge, LA 70813, USA
| | - J P Yanez
- Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2E1 Canada
| | - E Yildizci
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - S Yoshida
- Department of Physics and The International Center for Hadron Astrophysics, Chiba University, Chiba 263-8522, Japan
| | - S Yu
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
| | - T Yuan
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Z Zhang
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA
| | - P Zhelnin
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA 02138, USA
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Dessert C, Foster JW, Park Y, Safdi BR, Xu WL. Higgsino Dark Matter Confronts 14 Years of Fermi γ-Ray Data. PHYSICAL REVIEW LETTERS 2023; 130:201001. [PMID: 37267565 DOI: 10.1103/physrevlett.130.201001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 10/13/2022] [Accepted: 04/25/2023] [Indexed: 06/04/2023]
Abstract
Thermal Higgsino dark matter (DM), with mass around 1 TeV, is a well-motivated, minimal DM scenario that arises in supersymmetric extensions of the standard model. Higgsinos may naturally be the lightest superpartners in split-supersymmetry models that decouple the scalar superpartners while keeping Higgsinos and gauginos close to the TeV scale. Higgsino DM may annihilate today to give continuum γ-ray emission at energies less than a TeV in addition to a linelike signature at energies equal to the mass. Previous searches for Higgsino DM, for example with the H.E.S.S. γ-ray telescope, have not reached the necessary sensitivity to probe the Higgsino annihilation cross section. In this work we make use of 14 years of data from the Fermi Large Area Telescope at energies above ∼10 GeV to search for the continuum emission near the Galactic Center from Higgsino annihilation. We interpret our results using DM profiles from Milky Way analog galaxies in the FIRE-2 hydrodynamic cosmological simulations. We set the strongest constraints to date on Higgsino-like DM. Our results show a mild, ∼2σ preference for Higgsino DM with a mass near the thermal Higgsino mass and, depending on the DM density profile, the expected cross section.
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Affiliation(s)
- Christopher Dessert
- Berkeley Center for Theoretical Physics, University of California, Berkeley, California 94720, USA
- Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Leinweber Center for Theoretical Physics, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 USA
| | - Joshua W Foster
- Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Yujin Park
- Berkeley Center for Theoretical Physics, University of California, Berkeley, California 94720, USA
- Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Benjamin R Safdi
- Berkeley Center for Theoretical Physics, University of California, Berkeley, California 94720, USA
- Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Weishuang Linda Xu
- Berkeley Center for Theoretical Physics, University of California, Berkeley, California 94720, USA
- Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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5
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Widmark A, Korsmeier M, Linden T. Weighing the Local Interstellar Medium Using Gamma Rays and Dust. PHYSICAL REVIEW LETTERS 2023; 130:161002. [PMID: 37154658 DOI: 10.1103/physrevlett.130.161002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 01/24/2023] [Accepted: 03/16/2023] [Indexed: 05/10/2023]
Abstract
Cold gas forms a significant mass fraction of the Milky Way disk, but is its most uncertain baryonic component. The density and distribution of cold gas is of critical importance for Milky Way dynamics, as well as models of stellar and galactic evolution. Previous studies have used correlations between gas and dust to obtain high-resolution measurements of cold gas, but with large normalization uncertainties. We present a novel approach that uses Fermi-LAT γ-ray data to measure the total gas density, achieving a similar precision as previous works, but with independent systematic uncertainties. Notably, our results have sufficient precision to probe the range of results obtained by current world-leading experiments.
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Affiliation(s)
- Axel Widmark
- Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Jagtvej 128, 2200 Copenhagen N, Denmark
| | - Michael Korsmeier
- Stockholm University and The Oskar Klein Centre for Cosmoparticle Physics, Alba Nova, 10691 Stockholm, Sweden
| | - Tim Linden
- Stockholm University and The Oskar Klein Centre for Cosmoparticle Physics, Alba Nova, 10691 Stockholm, Sweden
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6
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Clark CJ, Kerr M, Barr ED, Bhattacharyya B, Breton RP, Bruel P, Camilo F, Chen W, Cognard I, Cromartie HT, Deneva J, Dhillon VS, Guillemot L, Kennedy MR, Kramer M, Lyne AG, Sánchez DM, Nieder L, Phillips C, Ransom SM, Ray PS, Roberts MSE, Roy J, Smith DA, Spiewak R, Stappers BW, Tabassum S, Theureau G, Voisin G. Neutron star mass estimates from gamma-ray eclipses in spider millisecond pulsar binaries. NATURE ASTRONOMY 2023; 7:451-462. [PMID: 37096051 PMCID: PMC10119022 DOI: 10.1038/s41550-022-01874-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 12/01/2022] [Indexed: 05/03/2023]
Abstract
Reliable neutron star mass measurements are key to determining the equation of state of cold nuclear matter, but such measurements are rare. Black widows and redbacks are compact binaries consisting of millisecond pulsars and semi-degenerate companion stars. Spectroscopy of the optically bright companions can determine their radial velocities, providing inclination-dependent pulsar mass estimates. Although inclinations can be inferred from subtle features in optical light curves, such estimates may be systematically biased due to incomplete heating models and poorly understood variability. Using data from the Fermi Large Area Telescope, we have searched for gamma-ray eclipses from 49 spider systems, discovering significant eclipses in 7 systems, including the prototypical black widow PSR B1957+20. Gamma-ray eclipses require direct occultation of the pulsar by the companion, and so the detection, or significant exclusion, of a gamma-ray eclipse strictly limits the binary inclination angle, providing new robust, model-independent pulsar mass constraints. For PSR B1957+20, the eclipse implies a much lighter pulsar (1.81 ± 0.07 solar masses) than inferred from optical light curve modelling.
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Affiliation(s)
- C. J. Clark
- Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Hannover, Germany
- Leibniz Universität Hannover, Hannover, Germany
- Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester, UK
| | - M. Kerr
- Space Science Division, Naval Research Laboratory, Washington, DC USA
| | - E. D. Barr
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - B. Bhattacharyya
- National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune, India
| | - R. P. Breton
- Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester, UK
| | - P. Bruel
- Laboratoire Leprince-Ringuet, École Polytechnique, CNRS/IN2P3, Palaiseau, France
| | - F. Camilo
- South African Radio Astronomy Observatory, Cape Town, South Africa
| | - W. Chen
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - I. Cognard
- Laboratoire de Physique et Chimie de l’Environnement et de l’Espace–Université d’Orléans, CNRS, Orléans, France
- Observatoire Radioastronomique de Nançay, Observatoire de Paris, Université PSL, Université d’Orléans, CNRS, Nançay, France
| | - H. T. Cromartie
- Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY USA
| | - J. Deneva
- Space Science Division, Naval Research Laboratory, Washington, DC USA
- College of Science, George Mason University, Fairfax, VA USA
| | - V. S. Dhillon
- Department of Physics and Astronomy, University of Sheffield, Sheffield, UK
- Instituto de Astrofísica de Canarias, La Laguna, Spain
| | - L. Guillemot
- Laboratoire de Physique et Chimie de l’Environnement et de l’Espace–Université d’Orléans, CNRS, Orléans, France
- Observatoire Radioastronomique de Nançay, Observatoire de Paris, Université PSL, Université d’Orléans, CNRS, Nançay, France
| | - M. R. Kennedy
- Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester, UK
- Department of Physics, University College Cork, Cork, Ireland
| | - M. Kramer
- Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester, UK
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - A. G. Lyne
- Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester, UK
| | - D. Mata Sánchez
- Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester, UK
- Instituto de Astrofísica de Canarias, La Laguna, Spain
- Departamento de Astrofísica, Universidad de La Laguna, La Laguna, Spain
| | - L. Nieder
- Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Hannover, Germany
- Leibniz Universität Hannover, Hannover, Germany
| | - C. Phillips
- University of Virginia, Charlottesville, VA USA
| | - S. M. Ransom
- National Radio Astronomy Observatory, Socorro, NM USA
| | - P. S. Ray
- Space Science Division, Naval Research Laboratory, Washington, DC USA
| | | | - J. Roy
- National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune, India
| | - D. A. Smith
- Laboratoire d’Astrophysique de Bordeaux, Université de Bordeaux, CNRS, Pessac, France
| | - R. Spiewak
- Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester, UK
- ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav), Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria Australia
- Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria Australia
| | - B. W. Stappers
- Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester, UK
| | - S. Tabassum
- New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Department of Physics and Astronomy, West Virginia University, Morgantown, WV USA
| | - G. Theureau
- Laboratoire de Physique et Chimie de l’Environnement et de l’Espace–Université d’Orléans, CNRS, Orléans, France
- Observatoire Radioastronomique de Nançay, Observatoire de Paris, Université PSL, Université d’Orléans, CNRS, Nançay, France
- Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, Meudon, France
| | - G. Voisin
- Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester, UK
- Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, Meudon, France
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Zhu CR, Cui MY, Xia ZQ, Yu ZH, Huang X, Yuan Q, Fan YZ. Explaining the GeV Antiproton Excess, GeV γ-Ray Excess, and W-Boson Mass Anomaly in an Inert Two Higgs Doublet Model. PHYSICAL REVIEW LETTERS 2022; 129:231101. [PMID: 36563204 DOI: 10.1103/physrevlett.129.231101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 09/20/2022] [Accepted: 10/31/2022] [Indexed: 06/17/2023]
Abstract
For the newly discovered W-boson mass anomaly, one of the simplest dark matter (DM) models that can account for the anomaly without violating other astrophysical and experimental constraints is the inert two Higgs doublet model, in which the DM mass (m_{S}) is found to be within ∼54-74 GeV. In this model, the annihilation of DM via SS→bb[over ¯] and SS→WW^{*} would produce antiprotons and gamma rays, and may account for the excesses identified previously in both particles. Motivated by this, we reanalyze the AMS-02 antiproton and Fermi-LAT Galactic center γ-ray data. For the antiproton analysis, the novel treatment is the inclusion of the charge-sign-dependent three-dimensional solar modulation model as constrained by the time-dependent proton data. We find that the excess of antiprotons is more distinct than previous results based on the force-field solar modulation model. The interpretation of this excess as the annihilation of SS→WW^{*} (SS→bb[over ¯]) requires a DM mass of ∼40-80 (40-60) GeV and a velocity-averaged cross section of O(10^{-26}) cm^{3} s^{-1}. As for the γ-ray data analysis, besides adopting the widely used spatial template fitting, we employ an orthogonal approach with a data-driven spectral template analysis. The fitting to the GeV γ-ray excess yields DM model parameters overlapped with those to fit the antiproton excess via the WW^{*} channel. The consistency of the DM particle properties required to account for the W-boson mass anomaly, the GeV antiproton excess, and the GeV γ-ray excess suggests a common origin of them.
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Affiliation(s)
- Cheng-Rui Zhu
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China
- Shandong Institute of Advanced Technology, Jinan 250100, China
| | - Ming-Yang Cui
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China
| | - Zi-Qing Xia
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China
| | - Zhao-Huan Yu
- School of Physics, Sun Yat-Sen University, Guangzhou 510275, China
| | - Xiaoyuan Huang
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China
- School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Qiang Yuan
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China
- School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Yi-Zhong Fan
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China
- School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, Anhui, China
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8
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Mei A, Banerjee B, Oganesyan G, Salafia OS, Giarratana S, Branchesi M, D'Avanzo P, Campana S, Ghirlanda G, Ronchini S, Shukla A, Tiwari P. Gigaelectronvolt emission from a compact binary merger. Nature 2022; 612:236-239. [PMID: 36477131 DOI: 10.1038/s41586-022-05404-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 10/03/2022] [Indexed: 12/12/2022]
Abstract
An energetic γ-ray burst (GRB), GRB 211211A, was observed on 11 December 20211,2. Despite its long duration, typically associated with bursts produced by the collapse of massive stars, the observation of an optical-infrared kilonova points to a compact binary merger origin3. Here we report observations of a significant (more than five sigma) transient-like emission in the high-energy γ-rays of GRB 211211A (more than 0.1 gigaelectronvolts) starting 103 seconds after the burst. After an initial phase with a roughly constant flux (about 5 × 10-10 erg per second per square centimetre) lasting about 2 × 104 seconds, the flux started decreasing and soon went undetected. Our detailed modelling of public and dedicated multi-wavelength observations demonstrates that gigaelectronvolt emission from GRB 211211A is in excess with respect to the flux predicted by the state-of-the-art afterglow model at such late time. We explore the possibility that the gigaelectronvolt excess is inverse Compton emission owing to the interaction of a late-time, low-power jet with an external source of photons, and find that kilonova emission can provide the seed photons. Our results open perspectives for observing binary neutron star mergers.
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Affiliation(s)
- Alessio Mei
- Gran Sasso Science Institute, L'Aquila, Italy.
- INFN - Laboratori Nazionali del Gran Sasso, L'Aquila, Italy.
| | - Biswajit Banerjee
- Gran Sasso Science Institute, L'Aquila, Italy
- INFN - Laboratori Nazionali del Gran Sasso, L'Aquila, Italy
| | - Gor Oganesyan
- Gran Sasso Science Institute, L'Aquila, Italy
- INFN - Laboratori Nazionali del Gran Sasso, L'Aquila, Italy
| | - Om Sharan Salafia
- Università degli Studi di Milano-Bicocca, Milan, Italy
- INFN - Sezione di Milano-Bicocca, Milan, Italy
- INAF - Osservatorio Astronomico di Brera, Merate, Italy
| | - Stefano Giarratana
- INAF - Istituto di Radioastronomia, Bologna, Italy
- Department of Physics and Astronomy, University of Bologna, Bologna, Italy
| | - Marica Branchesi
- Gran Sasso Science Institute, L'Aquila, Italy
- INFN - Laboratori Nazionali del Gran Sasso, L'Aquila, Italy
| | | | | | - Giancarlo Ghirlanda
- INFN - Sezione di Milano-Bicocca, Milan, Italy
- INAF - Osservatorio Astronomico di Brera, Merate, Italy
| | - Samuele Ronchini
- Gran Sasso Science Institute, L'Aquila, Italy
- INFN - Laboratori Nazionali del Gran Sasso, L'Aquila, Italy
| | - Amit Shukla
- Department of Astronomy, Astrophysics and Space Engineering, Indian Institute of Technology Indore, Indore, India
| | - Pawan Tiwari
- Department of Astronomy, Astrophysics and Space Engineering, Indian Institute of Technology Indore, Indore, India
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9
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Abbasi R, Ackermann M, Adams J, Aguilar JA, Ahlers M, Ahrens M, Alameddine JM, Alispach C, Alves AA, Amin NM, Andeen K, Anderson T, Anton G, Argüelles C, Ashida Y, Axani S, Bai X, Balagopal V. A, Barbano A, Barwick SW, Bastian B, Basu V, Baur S, Bay R, Beatty JJ, Becker KH, Becker Tjus J, Bellenghi C, BenZvi S, Berley D, Bernardini E, Besson DZ, Binder G, Bindig D, Blaufuss E, Blot S, Boddenberg M, Bontempo F, Borowka J, Böser S, Botner O, Böttcher J, Bourbeau E, Bradascio F, Braun J, Brinson B, Bron S, Brostean-Kaiser J, Browne S, Burgman A, Burley RT, Busse RS, Campana MA, Carnie-Bronca EG, Chen C, Chen Z, Chirkin D, Choi K, Clark BA, Clark K, Classen L, Coleman A, Collin GH, Conrad JM, Coppin P, Correa P, Cowen DF, Cross R, Dappen C, Dave P, De Clercq C, DeLaunay JJ, Delgado López D, Dembinski H, Deoskar K, Desai A, Desiati P, de Vries KD, de Wasseige G, de With M, DeYoung T, Diaz A, Díaz-Vélez JC, Dittmer M, Dujmovic H, Dunkman M, DuVernois MA, Dvorak E, Ehrhardt T, Eller P, Engel R, Erpenbeck H, Evans J, Evenson PA, Fan KL, Fazely AR, Fedynitch A, Feigl N, Fiedlschuster S, Fienberg AT, Filimonov K, Finley C, Fischer L, Fox D, Franckowiak A, Friedman E, Fritz A, Fürst P, Gaisser TK, Gallagher J, Ganster E, Garcia A, Garrappa S, Gerhardt L, Ghadimi A, Glaser C, Glauch T, Glüsenkamp T, Goldschmidt A, Gonzalez JG, Goswami S, Grant D, Grégoire T, Griswold S, Günther C, Gutjahr P, Haack C, Hallgren A, Halliday R, Halve L, Halzen F, Ha Minh M, Hanson K, Hardin J, Harnisch AA, Haungs A, Hebecker D, Helbing K, Henningsen F, Hettinger EC, Hickford S, Hignight J, Hill C, Hill GC, Hoffman KD, Hoffmann R, Hokanson-Fasig B, Hoshina K, Huang F, Huber M, Huber T, Hultqvist K, Hünnefeld M, Hussain R, Hymon K, In S, Iovine N, Ishihara A, Jansson M, Japaridze GS, Jeong M, Jin M, Jones BJP, Kang D, Kang W, Kang X, Kappes A, Kappesser D, Kardum L, Karg T, Karl M, Karle A, Katz U, Kauer M, Kellermann M, Kelley JL, Kheirandish A, Kin K, Kintscher T, Kiryluk J, Klein SR, Koirala R, Kolanoski H, Kontrimas T, Köpke L, Kopper C, Kopper S, Koskinen DJ, Koundal P, Kovacevich M, Kowalski M, Kozynets T, Kun E, Kurahashi N, Lad N, Lagunas Gualda C, Lanfranchi JL, Larson MJ, Lauber F, Lazar JP, Lee JW, Leonard K, Leszczyńska A, Li Y, Lincetto M, Liu QR, Liubarska M, Lohfink E, Lozano Mariscal CJ, Lu L, Lucarelli F, Ludwig A, Luszczak W, Lyu Y, Ma WY, Madsen J, Mahn KBM, Makino Y, Mancina S, Mariş IC, Martinez-Soler I, Maruyama R, Mase K, McElroy T, McNally F, Mead JV, Meagher K, Mechbal S, Medina A, Meier M, Meighen-Berger S, Micallef J, Mockler D, Montaruli T, Moore RW, Morse R, Moulai M, Naab R, Nagai R, Nahnhauer R, Naumann U, Necker J, Nguyen LV, Niederhausen H, Nisa MU, Nowicki SC, Nygren D, Obertacke Pollmann A, Oehler M, Oeyen B, Olivas A, O’Sullivan E, Pandya H, Pankova DV, Park N, Parker GK, Paudel EN, Paul L, Pérez de los Heros C, Peters L, Peterson J, Philippen S, Pieper S, Pittermann M, Pizzuto A, Plum M, Popovych Y, Porcelli A, Prado Rodriguez M, Price PB, Pries B, Przybylski GT, Raab C, Rack-Helleis J, Raissi A, Rameez M, Rawlins K, Rea IC, Rehman A, Reichherzer P, Reimann R, Renzi G, Resconi E, Reusch S, Rhode W, Richman M, Riedel B, Roberts EJ, Robertson S, Roellinghoff G, Rongen M, Rott C, Ruhe T, Ryckbosch D, Rysewyk Cantu D, Safa I, Saffer J, Sanchez Herrera SE, Sandrock A, Sandroos J, Santander M, Sarkar S, Sarkar S, Satalecka K, Schaufel M, Schieler H, Schindler S, Schmidt T, Schneider A, Schneider J, Schröder FG, Schumacher L, Schwefer G, Sclafani S, Seckel D, Seunarine S, Sharma A, Shefali S, Silva M, Skrzypek B, Smithers B, Snihur R, Soedingrekso J, Soldin D, Spannfellner C, Spiczak GM, Spiering C, Stachurska J, Stamatikos M, Stanev T, Stein R, Stettner J, Steuer A, Stezelberger T, Stokstad R, Stürwald T, Stuttard T, Sullivan GW, Taboada I, Ter-Antonyan S, Tilav S, Tischbein F, Tollefson K, Tönnis C, Toscano S, Tosi D, Trettin A, Tselengidou M, Tung CF, Turcati A, Turcotte R, Turley CF, Twagirayezu JP, Ty B, Unland Elorrieta MA, Valtonen-Mattila N, Vandenbroucke J, van Eijndhoven N, Vannerom D, van Santen J, Verpoest S, Walck C, Watson TB, Weaver C, Weigel P, Weindl A, Weiss MJ, Weldert J, Wendt C, Werthebach J, Weyrauch M, Whitehorn N, Wiebusch CH, Williams DR, Wolf M, Woschnagg K, Wrede G, Wulff J, Xu XW, Yanez JP, Yoshida S, Yu S, Yuan T, Zhang Z, Zhelnin P. Evidence for neutrino emission from the nearby active galaxy NGC 1068. Science 2022; 378:538-543. [DOI: 10.1126/science.abg3395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A supermassive black hole, obscured by cosmic dust, powers the nearby active galaxy NGC 1068. Neutrinos, which rarely interact with matter, could provide information on the galaxy’s active core. We searched for neutrino emission from astrophysical objects using data recorded with the IceCube neutrino detector between 2011 and 2020. The positions of 110 known gamma-ray sources were individually searched for neutrino detections above atmospheric and cosmic backgrounds. We found that NGC 1068 has an excess of
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neutrinos at tera–electron volt energies, with a global significance of 4.2σ, which we interpret as associated with the active galaxy. The flux of high-energy neutrinos that we measured from NGC 1068 is more than an order of magnitude higher than the upper limit on emissions of tera–electron volt gamma rays from this source.
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10
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Jorstad SG, Marscher AP, Raiteri CM, Villata M, Weaver ZR, Zhang H, Dong L, Gómez JL, Perel MV, Savchenko SS, Larionov VM, Carosati D, Chen WP, Kurtanidze OM, Marchini A, Matsumoto K, Mortari F, Aceti P, Acosta-Pulido JA, Andreeva T, Apolonio G, Arena C, Arkharov A, Bachev R, Banfi M, Bonnoli G, Borman GA, Bozhilov V, Carnerero MI, Damljanovic G, Ehgamberdiev SA, Elsässer D, Frasca A, Gabellini D, Grishina TS, Gupta AC, Hagen-Thorn VA, Hallum MK, Hart M, Hasuda K, Hemrich F, Hsiao HY, Ibryamov S, Irsmambetova TR, Ivanov DV, Joner MD, Kimeridze GN, Klimanov SA, Knött J, Kopatskaya EN, Kurtanidze SO, Kurtenkov A, Kuutma T, Larionova EG, Leonini S, Lin HC, Lorey C, Mannheim K, Marino G, Minev M, Mirzaqulov DO, Morozova DA, Nikiforova AA, Nikolashvili MG, Ovcharov E, Papini R, Pursimo T, Rahimov I, Reinhart D, Sakamoto T, Salvaggio F, Semkov E, Shakhovskoy DN, Sigua LA, Steineke R, Stojanovic M, Strigachev A, Troitskaya YV, Troitskiy IS, Tsai A, Valcheva A, Vasilyev AA, Vince O, Waller L, Zaharieva E, Chatterjee R. Rapid quasi-periodic oscillations in the relativistic jet of BL Lacertae. Nature 2022; 609:265-268. [PMID: 36071186 DOI: 10.1038/s41586-022-05038-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 06/28/2022] [Indexed: 12/24/2022]
Abstract
Blazars are active galactic nuclei (AGN) with relativistic jets whose non-thermal radiation is extremely variable on various timescales1-3. This variability seems mostly random, although some quasi-periodic oscillations (QPOs), implying systematic processes, have been reported in blazars and other AGN. QPOs with timescales of days or hours are especially rare4 in AGN and their nature is highly debated, explained by emitting plasma moving helically inside the jet5, plasma instabilities6,7 or orbital motion in an accretion disc7,8. Here we report results of intense optical and γ-ray flux monitoring of BL Lacertae (BL Lac) during a dramatic outburst in 2020 (ref. 9). BL Lac, the prototype of a subclass of blazars10, is powered by a 1.7 × 108 MSun (ref. 11) black hole in an elliptical galaxy (distance = 313 megaparsecs (ref. 12)). Our observations show QPOs of optical flux and linear polarization, and γ-ray flux, with cycles as short as approximately 13 h during the highest state of the outburst. The QPO properties match the expectations of current-driven kink instabilities6 near a recollimation shock about 5 parsecs (pc) from the black hole in the wake of an apparent superluminal feature moving down the jet. Such a kink is apparent in a microwave Very Long Baseline Array (VLBA) image.
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Affiliation(s)
- S G Jorstad
- Institute for Astrophysical Research, Boston University, Boston, MA, USA. .,Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia.
| | - A P Marscher
- Institute for Astrophysical Research, Boston University, Boston, MA, USA
| | - C M Raiteri
- INAF, Osservatorio Astrofisico di Torino, Torino, Italy
| | - M Villata
- INAF, Osservatorio Astrofisico di Torino, Torino, Italy
| | - Z R Weaver
- Institute for Astrophysical Research, Boston University, Boston, MA, USA
| | - H Zhang
- NASA Postdoctoral Program Fellow, Greenbelt, MD, USA.,NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - L Dong
- Department of Physics, Purdue University, West Lafayette, IN, USA
| | - J L Gómez
- Instituto de Astrofísica de Andalucía (CSIC), Granada, Spain
| | - M V Perel
- St. Petersburg State University, St. Petersburg, Russia
| | - S S Savchenko
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia.,Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, Russia.,Pulkovo Observatory, St. Petersburg, Russia
| | - V M Larionov
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia.,Pulkovo Observatory, St. Petersburg, Russia
| | - D Carosati
- EPT Observatories, Tijarafe, La Palma, Spain.,INAF, TNG Fundación Galileo Galilei, La Palma, Spain
| | - W P Chen
- Graduate Institute of Astronomy, National Central University, Taoyuan, Taiwan
| | - O M Kurtanidze
- Abastumani Observatory, Mt. Kanobili, Abastumani, Georgia.,Engelhardt Astronomical Observatory, Kazan Federal University, Tatarstan, Russia.,Zentrum für Astronomie der Universität Heidelberg, Landessternwarte, Heidelberg, Germany
| | - A Marchini
- Astronomical Observatory, Department of Physical Sciences, Earth and Environment, University of Siena, Siena, Italy
| | - K Matsumoto
- Astronomical Institute, Osaka Kyoiku University, Kashiwara, Japan
| | | | - P Aceti
- Osservatorio Astronomico Città di Seveso, Seveso, Italy.,Department of Aerospace Science and Technology, Politecnico di Milano, Milano, Italy
| | - J A Acosta-Pulido
- Instituto de Astrofísica de Canarias and Dpto. de Astrofísica, Universidad de La Laguna, Tenerife, Spain
| | - T Andreeva
- Institute of Applied Astronomy, Russian Academy of Sciences, St. Petersburg, Russia
| | - G Apolonio
- Department of Physics and Astronomy, Brigham Young University, Provo, UT, USA
| | - C Arena
- Gruppo Astrofili Catanesi (GAC), Catania, Italy
| | - A Arkharov
- Pulkovo Observatory, St. Petersburg, Russia
| | - R Bachev
- Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - M Banfi
- Osservatorio Astronomico Città di Seveso, Seveso, Italy
| | - G Bonnoli
- Instituto de Astrofísica de Andalucía (CSIC), Granada, Spain.,Astronomical Observatory, Department of Physical Sciences, Earth and Environment, University of Siena, Siena, Italy.,INAF-Osservatorio Astronomico di Brera, Merate, Italy
| | - G A Borman
- Crimean Astrophysical Observatory RAS, Bakhchisaray, Crimea
| | - V Bozhilov
- Department of Astronomy, Faculty of Physics, University of Sofia, Sofia, Bulgaria
| | - M I Carnerero
- INAF, Osservatorio Astrofisico di Torino, Torino, Italy
| | | | - S A Ehgamberdiev
- Ulugh Beg Astronomical Institute, Tashkent, Uzbekistan.,National University of Uzbekistan, Tashkent, Uzbekistan
| | - D Elsässer
- Hans-Haffner-Sternwarte, Naturwissenschaftliches Labor für Schüler am FKG, Würzburg, Germany.,Department of Physics, TU Dortmund University, Dortmund, Germany
| | - A Frasca
- INAF-Osservatorio Astrofisico di Catania, Catania, Italy
| | | | - T S Grishina
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia
| | - A C Gupta
- Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital, India
| | - V A Hagen-Thorn
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia
| | - M K Hallum
- Institute for Astrophysical Research, Boston University, Boston, MA, USA
| | - M Hart
- Institute for Astrophysical Research, Boston University, Boston, MA, USA
| | - K Hasuda
- Department of Physical Sciences, Aoyama Gakuin University, Tokyo, Japan
| | - F Hemrich
- Hans-Haffner-Sternwarte, Naturwissenschaftliches Labor für Schüler am FKG, Würzburg, Germany
| | - H Y Hsiao
- Graduate Institute of Astronomy, National Central University, Taoyuan, Taiwan
| | - S Ibryamov
- Department of Physics and Astronomy, Faculty of Natural Sciences, University of Shumen, Shumen, Bulgaria
| | - T R Irsmambetova
- Sternberg Astronomical Institute, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - D V Ivanov
- Institute of Applied Astronomy, Russian Academy of Sciences, St. Petersburg, Russia
| | - M D Joner
- Department of Physics and Astronomy, Brigham Young University, Provo, UT, USA
| | - G N Kimeridze
- Abastumani Observatory, Mt. Kanobili, Abastumani, Georgia
| | | | - J Knött
- Hans-Haffner-Sternwarte, Naturwissenschaftliches Labor für Schüler am FKG, Würzburg, Germany
| | - E N Kopatskaya
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia
| | - S O Kurtanidze
- Abastumani Observatory, Mt. Kanobili, Abastumani, Georgia.,Zentrum für Astronomie der Universität Heidelberg, Landessternwarte, Heidelberg, Germany
| | - A Kurtenkov
- Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - T Kuutma
- Centro de Estudios de Física del Cosmos de Aragón, Teruel, Spain
| | - E G Larionova
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia
| | - S Leonini
- Montarrenti Observatory, Siena, Italy
| | - H C Lin
- Graduate Institute of Astronomy, National Central University, Taoyuan, Taiwan
| | - C Lorey
- Hans-Haffner-Sternwarte, Naturwissenschaftliches Labor für Schüler am FKG, Würzburg, Germany
| | - K Mannheim
- Hans-Haffner-Sternwarte, Naturwissenschaftliches Labor für Schüler am FKG, Würzburg, Germany.,Lehrstuhl für Astronomie, Universität Würzburg, Würzburg, Germany
| | - G Marino
- Gruppo Astrofili Catanesi (GAC), Catania, Italy.,Wild Boar Remote Observatory, Florence, Italy
| | - M Minev
- Department of Astronomy, Faculty of Physics, University of Sofia, Sofia, Bulgaria
| | | | - D A Morozova
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia
| | - A A Nikiforova
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia.,Pulkovo Observatory, St. Petersburg, Russia
| | - M G Nikolashvili
- Abastumani Observatory, Mt. Kanobili, Abastumani, Georgia.,Zentrum für Astronomie der Universität Heidelberg, Landessternwarte, Heidelberg, Germany
| | - E Ovcharov
- Department of Astronomy, Faculty of Physics, University of Sofia, Sofia, Bulgaria
| | - R Papini
- Wild Boar Remote Observatory, Florence, Italy
| | - T Pursimo
- Nordic Optical Telescope, Santa Cruz de Tenerife, Spain.,Department of Physics and Astronomy, Aarhus University, Aarhus C, Denmark
| | - I Rahimov
- Institute of Applied Astronomy, Russian Academy of Sciences, St. Petersburg, Russia
| | - D Reinhart
- Hans-Haffner-Sternwarte, Naturwissenschaftliches Labor für Schüler am FKG, Würzburg, Germany
| | - T Sakamoto
- Department of Physical Sciences, Aoyama Gakuin University, Tokyo, Japan
| | - F Salvaggio
- Gruppo Astrofili Catanesi (GAC), Catania, Italy.,Wild Boar Remote Observatory, Florence, Italy
| | - E Semkov
- Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | | | - L A Sigua
- Abastumani Observatory, Mt. Kanobili, Abastumani, Georgia
| | - R Steineke
- Hans-Haffner-Sternwarte, Naturwissenschaftliches Labor für Schüler am FKG, Würzburg, Germany
| | - M Stojanovic
- Astronomical Observatory Belgrade, Belgrade, Serbia
| | - A Strigachev
- Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Y V Troitskaya
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia
| | - I S Troitskiy
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia
| | - A Tsai
- Graduate Institute of Astronomy, National Central University, Taoyuan, Taiwan
| | - A Valcheva
- Department of Astronomy, Faculty of Physics, University of Sofia, Sofia, Bulgaria
| | - A A Vasilyev
- Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia
| | - O Vince
- Astronomical Observatory Belgrade, Belgrade, Serbia
| | - L Waller
- Hans-Haffner-Sternwarte, Naturwissenschaftliches Labor für Schüler am FKG, Würzburg, Germany
| | - E Zaharieva
- Department of Astronomy, Faculty of Physics, University of Sofia, Sofia, Bulgaria
| | - R Chatterjee
- Department of Physics, Presidency University, Kolkata, India
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11
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Fang K, Kerr M, Blandford R, Fleischhack H, Charles E. Evidence for PeV Proton Acceleration from Fermi-LAT Observations of SNR G106.3+2.7. PHYSICAL REVIEW LETTERS 2022; 129:071101. [PMID: 36018684 DOI: 10.1103/physrevlett.129.071101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 03/08/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
The existence of a "knee" at energy ∼1 PeV in the cosmic-ray spectrum suggests the presence of Galactic PeV proton accelerators called "PeVatrons." Supernova remnant (SNR) G106.3+2.7 is a prime candidate for one of these. The recent detection of very high energy (0.1-100 TeV) gamma rays from G106.3+2.7 may be explained either by the decay of neutral pions or inverse Compton scattering by relativistic electrons. We report an analysis of 12 years of Fermi-LAT gamma-ray data that shows that the GeV-TeV gamma-ray spectrum is much harder and requires a different total electron energy than the radio and x-ray spectra, suggesting it has a distinct, hadronic origin. The nondetection of gamma rays below 10 GeV implies additional constraints on the relativistic electron spectrum. A hadronic interpretation of the observed gamma rays is strongly supported. This observation confirms the long-sought connection between Galactic PeVatrons and SNRs. Moreover, it suggests that G106.3+2.7 could be the brightest member of a new population of SNRs whose gamma-ray energy flux peaks at TeV energies. Such a population may contribute to the cosmic-ray knee and be revealed by future very high energy gamma-ray detectors.
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Affiliation(s)
- Ke Fang
- Department of Physics, Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, Wisconsin 53706, USA
| | - Matthew Kerr
- Space Science Division, Naval Research Laboratory, Washington, D.C. 20375, USA
| | - Roger Blandford
- Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, California 94305, USA
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Henrike Fleischhack
- Department of Physics, Catholic University of America, Washington, D.C. 20064, USA
- NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
- Center for Research and Exploration in Space Science and Technology, NASA/GSFC, Greenbelt, Maryland 20771, USA
| | - Eric Charles
- Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, California 94305, USA
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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12
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Keith C, Hooper D, Linden T, Liu R. Sensitivity of future gamma-ray telescopes to primordial black holes. Int J Clin Exp Med 2022. [DOI: 10.1103/physrevd.106.043003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Probing Spacetime Foam with Extragalactic Sources of High-Energy Photons. UNIVERSE 2022. [DOI: 10.3390/universe8070382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Quantum fluctuations can endow spacetime with a foamy structure. In this review article, we discuss our various proposals to observationally constrain models of spacetime foam. One way is to examine if the light wave-front from a distant quasar or GRB can be noticeably distorted by spacetime-foam-induced phase incoherence. As the phase fluctuations are proportional to the distance to the source but inversely proportional to the wavelength, ultra-high energy photons (>1 TeV) from distant sources are particularly useful. We elaborate on several proposals, including the possibility of detecting spacetime foam by observing “seeing disks” in the images of distant quasars and active galactic nuclei. We also discuss the appropriate distance measure for calculating the expected angular broadening. In addition, we discuss our more recent work in which we investigate whether wave-front distortions on small scales (due to spacetime foam) can cause distant objects become undetectable because the phase fluctuations have accumulated to the point at which image formation is impossible. Another possibility that has recently become accessible is to use interferometers to observe cosmologically distant sources, thereby giving a large baseline perpendicular to the local wave vector over which the wave front could become corrugated and thus distorted, reducing or eliminating its fringe visibility. We argue that all these methods ultimately depend on the availability of ways (if any) to carry out proper averaging of contributions from different light paths from the source to the telescope.
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14
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Abstract
The oscillation of the neutron n into mirror neutron n′, its partner from the dark mirror sector, can gradually transform an ordinary neutron star into a mixed star consisting in part of mirror dark matter. The implications of the reverse process taking place in the mirror neutron stars depend on the sign of baryon asymmetry in the mirror sector. Namely, if it is negative, as predicted by certain baryogenesis scenarios, then n′¯−n¯ transitions create a core of our antimatter gravitationally trapped in the mirror star interior. The annihilation of accreted gas on such antimatter cores could explain the origin of γ-source candidates with an unusual spectrum compatible with baryon–antibaryon annihilation, recently identified in the Fermi LAT catalog. In addition, some part of this antimatter escaping after the mergers of mirror neutron stars can produce the flux of cosmic antihelium and also heavier antinuclei which are hunted in the AMS-02 experiment.
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Coronado-Blázquez J, Sánchez-Conde MA, Pérez-Romero J, Aguirre-Santaella A. Spatial extension of dark subhalos as seen by
Fermi
-LAT and the implications for WIMP constraints. Int J Clin Exp Med 2022. [DOI: 10.1103/physrevd.105.083006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Abstract
After large galaxies merge, their central supermassive black holes are expected to form binary systems. Their orbital motion should generate a gravitational wave background (GWB) at nanohertz frequencies. Searches for this background utilize pulsar timing arrays, which perform long-term monitoring of millisecond pulsars at radio wavelengths. We use 12.5 years of Fermi Large Area Telescope data to form a gamma-ray pulsar timing array. Results from 35 bright gamma-ray pulsars place a 95% credible limit on the GWB characteristic strain of 1.0 × 10-14 at a frequency of 1 yr-1. The sensitivity is expected to scale with t obs, the observing time span, as [Formula: see text]. This direct measurement provides an independent probe of the GWB while offering a check on radio noise models.
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17
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Aharonian F, Ait Benkhali F, Angüner EO, Ashkar H, Backes M, Baghmanyan V, Barbosa Martins V, Batzofin R, Becherini Y, Berge D, Bernlöhr K, Bi B, Böttcher M, Boisson C, Bolmont J, de Bony de Lavergne M, Breuhaus M, Brose R, Brun F, Caroff S, Casanova S, Cerruti M, Chand T, Chen A, Cotter G, Damascene Mbarubucyeye J, Djannati-Ataï A, Dmytriiev A, Doroshenko V, Duffy C, Egberts K, Ernenwein JP, Fegan S, Feijen K, Fiasson A, Fichet de Clairfontaine G, Fontaine G, Füßling M, Funk S, Gabici S, Gallant YA, Ghafourizadeh S, Giavitto G, Giunti L, Glawion D, Glicenstein JF, Grondin MH, Hermann G, Hinton JA, Hörbe M, Hofmann W, Hoischen C, Holch TL, Holler M, Horns D, Huang Z, Jamrozy M, Jankowsky F, Jung-Richardt I, Kasai E, Katarzyński K, Katz U, Khangulyan D, Khélifi B, Klepser S, Kluźniak W, Komin N, Konno R, Kosack K, Kostunin D, Le Stum S, Lemière A, Lemoine-Goumard M, Lenain JP, Leuschner F, Lohse T, Luashvili A, Lypova I, Mackey J, Malyshev D, Malyshev D, Marandon V, Marchegiani P, Marcowith A, Martí-Devesa G, Marx R, Maurin G, Meyer M, Mitchell A, Moderski R, Mohrmann L, Montanari A, Moulin E, Muller J, Murach T, Nakashima K, de Naurois M, Nayerhoda A, Niemiec J, Priyana Noel A, O'Brien P, Ohm S, Olivera-Nieto L, de Ona Wilhelmi E, Ostrowski M, Panny S, Panter M, Parsons RD, Peron G, Pita S, Poireau V, Prokhorov DA, Prokoph H, Pühlhofer G, Punch M, Quirrenbach A, Reichherzer P, Reimer A, Reimer O, Renaud M, Reville B, Rieger F, Rowell G, Rudak B, Rueda Ricarte H, Ruiz-Velasco E, Sahakian V, Sailer S, Salzmann H, Sanchez DA, Santangelo A, Sasaki M, Schäfer J, Schüssler F, Schutte HM, Schwanke U, Senniappan M, Shapopi JNS, Simoni R, Sinha A, Sol H, Specovius A, Spencer S, Stawarz Ł, Steinmassl S, Steppa C, Takahashi T, Tanaka T, Taylor AM, Terrier R, Thorpe-Morgan C, Tsirou M, Tsuji N, Tuffs R, Uchiyama Y, Unbehaun T, van Eldik C, van Soelen B, Veh J, Venter C, Vink J, Wagner SJ, Werner F, White R, Wierzcholska A, Wong YW, Yusafzai A, Zacharias M, Zargaryan D, Zdziarski AA, Zech A, Zhu SJ, Zouari S, Żywucka N. Time-resolved hadronic particle acceleration in the recurrent nova RS Ophiuchi. Science 2022; 376:77-80. [PMID: 35271303 DOI: 10.1126/science.abn0567] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Recurrent novae are repeating thermonuclear explosions in the outer layers of white dwarfs, due to the accretion of fresh material from a binary companion. The shock generated when ejected material slams into the companion star's wind can accelerate particles. We report very-high-energy (VHE, [Formula: see text]) gamma rays from the recurrent nova RS Ophiuchi, up to a month after its 2021 outburst, observed using the High Energy Stereoscopic System. The VHE emission has a similar temporal profile to lower-energy GeV emission, indicating a common origin, with a two-day delay in peak flux. These observations constrain models of time-dependent particle energization, favoring a hadronic emission scenario over the leptonic alternative. Shocks in dense winds provide favorable environments for efficient acceleration of cosmic-rays to very high energies.
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Affiliation(s)
- F Aharonian
- Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
- High Energy Astrophysics Laboratory, Russian-Armenian University (RAU), 123 Hovsep Emin St Yerevan 0051, Armenia
| | - F Ait Benkhali
- Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany
| | - E O Angüner
- Aix Marseille Université, Centre national de la recherche scientifique (CNRS)/Institut National de Physique Nucléaire et Physique des Particules (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Marseille, France
| | - H Ashkar
- Laboratoire Leprince-Ringuet, École Polytechnique, CNRS, Institut Polytechnique de Paris, F-91128 Palaiseau, France
| | - M Backes
- University of Namibia, Department of Physics, Private Bag 13301, Windhoek 10005, Namibia
- Centre for Space Research, North-West University, Potchefstroom 2520, South Africa
| | - V Baghmanyan
- Instytut Fizyki J[Formula: see text]drowej Polskiej Akademii Nauk (PAN), ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - V Barbosa Martins
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - R Batzofin
- School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2050 South Africa
| | - Y Becherini
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
- Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden
| | - D Berge
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - K Bernlöhr
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - B Bi
- Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany
| | - M Böttcher
- Centre for Space Research, North-West University, Potchefstroom 2520, South Africa
| | - C Boisson
- Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France
| | - J Bolmont
- Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 Place Jussieu, F-75252 Paris, France
| | - M de Bony de Lavergne
- Université Savoie Mont Blanc, CNRS, Laboratoire d'Annecy de Physique des Particules - IN2P3, 74000 Annecy, France
| | - M Breuhaus
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - R Brose
- Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland
| | - F Brun
- Institute for Research on the Fundamental Laws of the Universe (IRFU), Commisariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - S Caroff
- Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 Place Jussieu, F-75252 Paris, France
| | - S Casanova
- Instytut Fizyki J[Formula: see text]drowej Polskiej Akademii Nauk (PAN), ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - M Cerruti
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
| | - T Chand
- Centre for Space Research, North-West University, Potchefstroom 2520, South Africa
| | - A Chen
- School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2050 South Africa
| | - G Cotter
- University of Oxford, Department of Physics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
| | | | - A Djannati-Ataï
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
| | - A Dmytriiev
- Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France
| | - V Doroshenko
- Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany
| | - C Duffy
- University of Oxford, Department of Physics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
| | - K Egberts
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany
| | - J-P Ernenwein
- Aix Marseille Université, Centre national de la recherche scientifique (CNRS)/Institut National de Physique Nucléaire et Physique des Particules (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Marseille, France
| | - S Fegan
- Laboratoire Leprince-Ringuet, École Polytechnique, CNRS, Institut Polytechnique de Paris, F-91128 Palaiseau, France
| | - K Feijen
- School of Physical Sciences, University of Adelaide, Adelaide 5005, Australia
| | - A Fiasson
- Université Savoie Mont Blanc, CNRS, Laboratoire d'Annecy de Physique des Particules - IN2P3, 74000 Annecy, France
| | - G Fichet de Clairfontaine
- Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France
| | - G Fontaine
- Laboratoire Leprince-Ringuet, École Polytechnique, CNRS, Institut Polytechnique de Paris, F-91128 Palaiseau, France
| | - M Füßling
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - S Funk
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - S Gabici
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
| | - Y A Gallant
- Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France
| | - S Ghafourizadeh
- Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany
| | - G Giavitto
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - L Giunti
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
- Institute for Research on the Fundamental Laws of the Universe (IRFU), Commisariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - D Glawion
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - J F Glicenstein
- Institute for Research on the Fundamental Laws of the Universe (IRFU), Commisariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - M-H Grondin
- Université Bordeaux, CNRS, Laboratoire de Physique des Deux Infinis (LP2i), Bordeaux, Joint Research Unit (UMR 5797), F-33170 Gradignan, France
| | - G Hermann
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - J A Hinton
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - M Hörbe
- University of Oxford, Department of Physics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
| | - W Hofmann
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - C Hoischen
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany
| | - T L Holch
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - M Holler
- Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria
| | - D Horns
- Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany
| | - Zhiqiu Huang
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - M Jamrozy
- Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul. Orla 171, 30-244 Kraków, Poland
| | - F Jankowsky
- Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany
| | - I Jung-Richardt
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - E Kasai
- University of Namibia, Department of Physics, Private Bag 13301, Windhoek 10005, Namibia
| | - K Katarzyński
- Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
| | - U Katz
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - D Khangulyan
- Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - B Khélifi
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
| | - S Klepser
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - W Kluźniak
- Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland
| | - Nu Komin
- School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2050 South Africa
| | - R Konno
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - K Kosack
- Institute for Research on the Fundamental Laws of the Universe (IRFU), Commisariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - D Kostunin
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - S Le Stum
- Aix Marseille Université, Centre national de la recherche scientifique (CNRS)/Institut National de Physique Nucléaire et Physique des Particules (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Marseille, France
| | - A Lemière
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
| | - M Lemoine-Goumard
- Université Bordeaux, CNRS, Laboratoire de Physique des Deux Infinis (LP2i), Bordeaux, Joint Research Unit (UMR 5797), F-33170 Gradignan, France
| | - J-P Lenain
- Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 Place Jussieu, F-75252 Paris, France
| | - F Leuschner
- Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany
| | - T Lohse
- Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, D 12489 Berlin, Germany
| | - A Luashvili
- Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France
| | - I Lypova
- Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany
| | - J Mackey
- Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland
| | - D Malyshev
- Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany
| | - D Malyshev
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - V Marandon
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - P Marchegiani
- School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2050 South Africa
| | - A Marcowith
- Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France
| | - G Martí-Devesa
- Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria
| | - R Marx
- Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany
| | - G Maurin
- Université Savoie Mont Blanc, CNRS, Laboratoire d'Annecy de Physique des Particules - IN2P3, 74000 Annecy, France
| | - M Meyer
- Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany
| | - A Mitchell
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - R Moderski
- Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland
| | - L Mohrmann
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - A Montanari
- Institute for Research on the Fundamental Laws of the Universe (IRFU), Commisariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - E Moulin
- Institute for Research on the Fundamental Laws of the Universe (IRFU), Commisariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - J Muller
- Laboratoire Leprince-Ringuet, École Polytechnique, CNRS, Institut Polytechnique de Paris, F-91128 Palaiseau, France
| | - T Murach
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - K Nakashima
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - M de Naurois
- Laboratoire Leprince-Ringuet, École Polytechnique, CNRS, Institut Polytechnique de Paris, F-91128 Palaiseau, France
| | - A Nayerhoda
- Instytut Fizyki J[Formula: see text]drowej Polskiej Akademii Nauk (PAN), ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - J Niemiec
- Instytut Fizyki J[Formula: see text]drowej Polskiej Akademii Nauk (PAN), ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - A Priyana Noel
- Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul. Orla 171, 30-244 Kraków, Poland
| | - P O'Brien
- Department of Physics and Astronomy, The University of Leicester, University Road, Leicester, LE1 7RH, UK
| | - S Ohm
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - L Olivera-Nieto
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - E de Ona Wilhelmi
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - M Ostrowski
- Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul. Orla 171, 30-244 Kraków, Poland
| | - S Panny
- Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria
| | - M Panter
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - R D Parsons
- Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, D 12489 Berlin, Germany
| | - G Peron
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - S Pita
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
| | - V Poireau
- Université Savoie Mont Blanc, CNRS, Laboratoire d'Annecy de Physique des Particules - IN2P3, 74000 Annecy, France
| | - D A Prokhorov
- Gravitation and Astroparticle Physics at the University of Amsterdam (GRAPPA), Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands
| | - H Prokoph
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - G Pühlhofer
- Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany
| | - M Punch
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
- Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden
| | - A Quirrenbach
- Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany
| | - P Reichherzer
- Institute for Research on the Fundamental Laws of the Universe (IRFU), Commisariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Reimer
- Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria
| | - O Reimer
- Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria
| | - M Renaud
- Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France
| | - B Reville
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - F Rieger
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - G Rowell
- School of Physical Sciences, University of Adelaide, Adelaide 5005, Australia
| | - B Rudak
- Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland
| | - H Rueda Ricarte
- Institute for Research on the Fundamental Laws of the Universe (IRFU), Commisariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - E Ruiz-Velasco
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - V Sahakian
- Yerevan Physics Institute, 2 Alikhanian Brothers St., 375036 Yerevan, Armenia
| | - S Sailer
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - H Salzmann
- Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany
| | - D A Sanchez
- Université Savoie Mont Blanc, CNRS, Laboratoire d'Annecy de Physique des Particules - IN2P3, 74000 Annecy, France
| | - A Santangelo
- Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany
| | - M Sasaki
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - J Schäfer
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - F Schüssler
- Institute for Research on the Fundamental Laws of the Universe (IRFU), Commisariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - H M Schutte
- Centre for Space Research, North-West University, Potchefstroom 2520, South Africa
| | - U Schwanke
- Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, D 12489 Berlin, Germany
| | - M Senniappan
- Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden
| | - J N S Shapopi
- University of Namibia, Department of Physics, Private Bag 13301, Windhoek 10005, Namibia
| | - R Simoni
- Gravitation and Astroparticle Physics at the University of Amsterdam (GRAPPA), Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands
| | - A Sinha
- Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France
| | - H Sol
- Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France
| | - A Specovius
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - S Spencer
- University of Oxford, Department of Physics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
| | - Ł Stawarz
- Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul. Orla 171, 30-244 Kraków, Poland
| | - S Steinmassl
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - C Steppa
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany
| | - T Takahashi
- Kavli Institute for the Physics and Mathematics of the Universe (World Premier International Research Center Initiative (WPI)), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba, 277-8583, Japan
| | - T Tanaka
- Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, Hyogo 658-8501, Japan
| | - A M Taylor
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - R Terrier
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
| | - C Thorpe-Morgan
- Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany
| | - M Tsirou
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - N Tsuji
- Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - R Tuffs
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - Y Uchiyama
- Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - T Unbehaun
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - C van Eldik
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - B van Soelen
- Department of Physics, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
| | - J Veh
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - C Venter
- Centre for Space Research, North-West University, Potchefstroom 2520, South Africa
| | - J Vink
- Gravitation and Astroparticle Physics at the University of Amsterdam (GRAPPA), Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands
| | - S J Wagner
- Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany
| | - F Werner
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - R White
- Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
| | - A Wierzcholska
- Instytut Fizyki J[Formula: see text]drowej Polskiej Akademii Nauk (PAN), ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - Yu Wun Wong
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - A Yusafzai
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany
| | - M Zacharias
- Centre for Space Research, North-West University, Potchefstroom 2520, South Africa
- Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France
| | - D Zargaryan
- Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland
- High Energy Astrophysics Laboratory, Russian-Armenian University (RAU), 123 Hovsep Emin St Yerevan 0051, Armenia
| | - A A Zdziarski
- Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland
| | - A Zech
- Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France
| | - S J Zhu
- Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany
| | - S Zouari
- Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
| | - N Żywucka
- Centre for Space Research, North-West University, Potchefstroom 2520, South Africa
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Abstract
The propagation of gamma-rays over cosmological distances is the subject of extensive theoretical and observational research at GeV and TeV energies. The mean free path of gamma-rays in the cosmic web is limited above 100 GeV due to the production of electrons and positrons on the cosmic optical and infrared backgrounds. Electrons and positrons cool in the intergalactic medium while gyrating in its magnetic fields, which could cause either its global heating or the production of lower-energy secondary gamma-rays. The energy distribution of gamma-rays surviving the cosmological journey carries observed absorption features that gauge the emissivity of baryonic matter over cosmic time, constrain the distance scale of ΛCDM cosmology, and limit the alterations of the interaction cross section. Competitive constraints are, in particular, placed on the cosmic star-formation history as well as on phenomena expected from quantum gravity and string theory, such as the coupling to hypothetical axion-like particles or the violation of Lorentz invariance. Recent theoretical and observational advances offer a glimpse of the multi-wavelength and multi-messenger path that the new generation of gamma-ray observatories is about to open.
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Abstract
Introduced in 1998 to attempt a first unified view of the broad-band emission properties of blazars, the blazar sequence has been extensively used in the past 25 years to guide observations as well as the physical interpretation of the overall emission from these galaxies. In this review, we describe the evolution of the sequence along with the tremendous advances in the observational field, in particular in the gamma-ray band. A new version of the sequence built on TeV-detected objects is also presented. Two extreme classes of objects (MeV and hard-TeV blazars) are included in the discussion, given their relevance for future observatories. Finally, the current physical understanding at the base of the sequence is presented along with the major criticisms to the blazar sequence.
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Abstract
The radio-loud quasar CTD 135 (2234+282, J2236+2828) has been proposed as a candidate compact symmetric object (CSO), based on its symmetric radio structure revealed by multi-frequency very long baseline interferometry (VLBI) imaging observations on milliarcsec angular scales. CSOs are known as young jetted active galactic nuclei (AGN) whose relativistic plasma jets are misaligned with respect to the line of sight. The peculiarity of CTD 135 as a CSO candidate was its detection in γ-rays, while the vast majority of known γ-ray emitting AGN are blazars with jets pointing close to our viewing direction. Since only a handful of CSOs are known as γ-ray sources, the unambiguous identification of a single candidate is important for studying this rare class of objects. By collecting and interpreting observational data from the recent literature, we revisit the classification of CTD 135. We present evidence that the object, based on its flat-spectrum radio core with high brightness temperature, variability at multiple wavebands, and infrared colours should be classified as a blazar rather than a CSO.
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21
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Davies J, Meyer M, Cotter G. Relevance of photon-photon dispersion within the jet for blazar axionlike particle searches. Int J Clin Exp Med 2022. [DOI: 10.1103/physrevd.105.023017] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Cholis I, Krommydas I. Utilizing cosmic-ray positron and electron observations to probe the averaged properties of Milky Way pulsars. Int J Clin Exp Med 2022. [DOI: 10.1103/physrevd.105.023015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Nonthermal Radiation of the Extreme TeV Blazar 1ES 0229+200 from Electromagnetic Cascades on Infrared Photon Field. UNIVERSE 2021. [DOI: 10.3390/universe7120494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Extreme TeV blazars (ETBs) are active galactic nuclei with jets presumably pointing towards the observer having their intrinsic (compensated for the effect of γ-ray absorption on extragalactic background light photons) spectral energy distributions (SEDs) peaked at an energy in excess of 1 TeV. These sources typically reveal relatively weak and slow variability as well as higher frequency of the low-energy SED peak compared to other classes of blazars. It proved to be exceedingly hard to incorporate all these peculiar properties of ETBs into the framework of conventional γ-ray emission models. ETB physics have recently attracted great attention in the astrophysical community, underlying the importance of the development of self-consistent ETB emission model(s). We propose a new scenario for the formation of X-ray and γ-ray spectra of ETBs assuming that electromagnetic cascades develop in the infrared photon field surrounding the central blazar engine. This scenario does not invoke compact fast-moving sources of radiation (so-called “blobs”), in agreement with the apparent absence of fast and strong variability of ETBs. For the case of the extreme TeV blazar 1ES 0229+200 we propose a specific emission model in the framework of the considered scenario. We demonstrate that this model allows to obtain a good fit to the measured SED of 1ES 0229+200.
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24
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Abstract
Blazars are known to emit exceptionally variable non-thermal emission over the wide range (from radio to γ-rays) of electromagnetic spectrum. We present here the results of our γ-ray flux and spectral variability study of the blazar Ton 599, which has been recently observed in the γ-ray flaring state. Using 0.1–300 GeV γ-ray data from the Fermi Gamma-ray Space Telescope (hereinafter Fermi), we generated one-day binned light curve of Ton 599 for a period of about one-year from MJD 59,093 to MJD 59,457. During this one year period, the maximum γ-ray flux detected was 2.24 ± 0.25 × 10−6 ph cm−2 s−1 at MJD 59,399.50. We identified three different flux states, namely, epoch A (quiescent), epoch B (pre-flare) and epoch C (main-flare). For each epoch, we calculated the γ-ray flux variability amplitude (Fvar) and found that the source showed largest flux variations in epoch C with Fvar∼ 35%. We modelled the γ-ray spectra for each epoch and found that the Log-parabola model adequately describes the γ-ray spectra for all the three epochs. We estimated the size of the γ-ray emitting region as 1.03 × 1016 cm and determined that the origin of γ-ray radiation, during the main-flare, could be outside of the broad line region.
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25
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Abstract
We review and discuss recent results on the search for correlations between astrophysical neutrinos and γ-ray-detected sources, with many extragalactic studies reporting potential associations with different types of blazars. We investigate possible dependencies on blazar sub-classes by using the largest catalogues and all the multi-frequency data available. Through the study of similarities and differences in these sources we conclude that blazars come in two distinct flavours: LBLs and IHBLs (low-energy-peaked and intermediate-high-energy-peaked objects). These are distinguished by widely different properties such as the overall spectral energy distribution shape, jet speed, cosmological evolution, broad-band spectral variability, and optical polarisation properties. Although blazars of all types have been proposed as neutrino sources, evidence is accumulating in favour of IHBLs being the counterparts of astrophysical neutrinos. If this is indeed the case, we argue that the peculiar observational properties of IHBLs may be indirectly related to proton acceleration to very high energies.
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26
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Abstract
PSR B1259-63 is a γ-ray binary system, where the compact object is a pulsar. The system has an orbital period of 1236.7 days and shows peculiar γ-ray flares (in 100 MeV–300 GeV) after its periastron time. We analyzed the Fermi-LAT observation of PSR B1259-63 during its latest periastron passage, as well as its previous three periastrons. The bright GeV flares started about 60 days after the periastron epoch in 2021. This delay is larger than that around the 2017 periastron and much larger than earlier periastrons. The delay of the GeV flux peak time in each periastron passage is apparent in our results. We discussed the possible origin of this delay and made a prediction of the GeV flux peak time in next periastron passage, based on observation of the previous delays.
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27
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Huang X, Yuan Q, Fan YZ. A GeV-TeV particle component and the barrier of cosmic-ray sea in the Central Molecular Zone. Nat Commun 2021; 12:6169. [PMID: 34753922 PMCID: PMC8578646 DOI: 10.1038/s41467-021-26436-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 09/27/2021] [Indexed: 11/09/2022] Open
Abstract
Cosmic rays are important probe of a number of fundamental physical problems such as the acceleration of high and very high energy particles in extreme astrophysical environments. The Galactic center is widely anticipated to be an important cosmic-ray source and the observations of some Imaging Atmospheric Cherenkov Telescopes did successfully reveal a component of TeV-PeV cosmic rays in the vicinity of the Galactic center. Here we report the identification of GeV-TeV cosmic rays in the central molecular zone with the γ-ray observations of the Fermi Large Area Telescope, whose spectrum and spatial gradient are consistent with that measured by the Imaging Atmospheric Cherenkov Telescopes but the corresponding cosmic-ray energy density is substantially lower than the so-called cosmic-ray sea component, suggesting the presence of a high energy particle accelerator at the Galactic center and the existence of a barrier that can effectively suppress the penetration of the particles from the cosmic-ray sea to the central molecular zone.
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Affiliation(s)
- Xiaoyuan Huang
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210023, China. .,School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui, 230026, China.
| | - Qiang Yuan
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210023, China. .,School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui, 230026, China.
| | - Yi-Zhong Fan
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210023, China. .,School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui, 230026, China.
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28
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Calore F, Donato F, Manconi S. Dissecting the Inner Galaxy with γ-Ray Pixel Count Statistics. PHYSICAL REVIEW LETTERS 2021; 127:161102. [PMID: 34723610 DOI: 10.1103/physrevlett.127.161102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/11/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
We combine adaptive template fitting and pixel count statistics in order to assess the nature of the Galactic Center excess in Fermi-LAT data. We reconstruct the flux distribution of point sources well below the Fermi-LAT detection threshold, and measure their radial and longitudinal profiles in the inner Galaxy. We find that all point sources and the bulge-correlated diffuse emission each contributes O(10%) of the total inner Galaxy emission, and disclose a potential subthreshold point-source contribution to the Galactic Center excess.
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Affiliation(s)
- F Calore
- Université Grenoble Alpes, USMB, CNRS, LAPTh, F-74940 Annecy, France
| | - F Donato
- Dipartimento di Fisica, Università di Torino, via P. Giuria, 1, I-10125 Torino, Italy
- Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via P. Giuria, 1, I-10125 Torino, Italy
| | - S Manconi
- Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen University, Sommerfeldstraße 16, 52056 Aachen, Germany
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29
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A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei—Preliminary Results. UNIVERSE 2021. [DOI: 10.3390/universe7100372] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We are compiling a new list of gamma-ray jetted active galactic nuclei (AGN), starting from the fourth catalog of point sources of the Fermi Large Area Telescope (LAT). Our aim is to prepare a list of jetted AGN with known redshifts and classifications to be used to calibrate jet power. We searched in the available literature for all the published optical spectra and multiwavelength studies useful to characterize the sources. We found new, missed, or even forgotten information leading to a substantial change in the redshift values and classification of many sources. We present here the preliminary results of this analysis and some statistics based on the gamma-ray sources with right ascension within the interval 0h--12h (J2000). Although flat-spectrum radio quasars and BL Lac objects are still the dominant populations, there is a significant increase in the number of other objects, such as misaligned AGN, narrow-line Seyfert 1 galaxies, and Seyfert galaxies. We also introduced two new classes of objects: changing-look AGN and ambiguous sources. About one third of the sources remain unclassified.
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30
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Abstract
The Virgo detector, based at the EGO (European Gravitational Observatory) and located in Cascina (Pisa), played a significant role in the development of the gravitational-wave astronomy. From its first scientific run in 2007, the Virgo detector has constantly been upgraded over the years; since 2017, with the Advanced Virgo project, the detector reached a high sensitivity that allowed the detection of several classes of sources and to investigate new physics. This work reports the main hardware upgrades of the detector and the main astrophysical results from the latest five years; future prospects for the Virgo detector are also presented.
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31
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Jóhannesson G, Porter TA. Signatures of Recent Cosmic-Ray Acceleration in the High-latitude Gamma-Ray Sky. THE ASTROPHYSICAL JOURNAL 2021; 917:30. [PMID: 34776518 PMCID: PMC8587633 DOI: 10.3847/1538-4357/ac01c9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Cosmic-ray (CR) sources temporarily enhance the relativistic particle density in their vicinity over the background distribution accumulated from the Galaxy-wide past injection activity and propagation. If individual sources are close enough to the solar system, their localized enhancements may present as features in the measured spectra of the CRs and in the associated secondary electromagnetic emissions. Large-scale loop-like structures visible in the radio sky are possible signatures of such nearby CR sources. If so, these loops may also have counterparts in the high-latitude γ-ray sky. Using ~10 yr of data from the Fermi Large Area Telescope, applying Bayesian analysis including Gaussian Processes, we search for extended enhanced emission associated with putative nearby CR sources in the energy range from 1 GeV to 1 TeV for the sky region |b| > 30°. We carefully control the systematic uncertainty due to imperfect knowledge of the interstellar gas distribution. Radio Loop IV is identified for the first time as a γ-ray emitter, and we also find significant emission from Loop I. Strong evidence is found for asymmetric features about the Galactic l = 0° meridian that may be associated with parts of the so-called "Fermi Bubbles," and some evidence is also found for γ-ray emission from other radio loops. Implications for the CRs producing the features and possible locations of the sources of the emissions are discussed.
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Affiliation(s)
- Guđlaugur Jóhannesson
- Science Institute, University of Iceland, IS-107 Reykjavik, Iceland
- Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden
| | - Troy A Porter
- W.W. Hansen Experimental Physics Laboratory and Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA
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32
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Amenomori M, Bao YW, Bi XJ, Chen D, Chen TL, Chen WY, Chen X, Chen Y, Cui SW, Ding LK, Fang JH, Fang K, Feng CF, Feng Z, Feng ZY, Gao Q, Gomi A, Gou QB, Guo YQ, Guo YY, He HH, He ZT, Hibino K, Hotta N, Hu H, Hu HB, Huang J, Jia HY, Jiang L, Jiang P, Jin HB, Kasahara K, Katayose Y, Kato C, Kato S, Kawata K, Kozai M, Kurashige D, Le GM, Li AF, Li HJ, Li WJ, Li Y, Lin YH, Liu B, Liu C, Liu JS, Liu LY, Liu MY, Liu W, Liu XL, Lou YQ, Lu H, Meng XR, Munakata K, Nakada H, Nakamura Y, Nakazawa Y, Nanjo H, Ning CC, Nishizawa M, Ohnishi M, Ohura T, Okukawa S, Ozawa S, Qian L, Qian X, Qian XL, Qu XB, Saito T, Sakata M, Sako T, Sako TK, Shao J, Shibata M, Shiomi A, Sugimoto H, Takano W, Takita M, Tan YH, Tateyama N, Torii S, Tsuchiya H, Udo S, Wang H, Wang YP, Wu HR, Wu Q, Xu JL, Xue L, Yamamoto Y, Yang Z, Yao YQ, Yin J, Yokoe Y, Yu NP, Yuan AF, Zhai LM, Zhang CP, Zhang HM, Zhang JL, Zhang X, Zhang XY, Zhang Y, Zhang Y, Zhang Y, Zhao SP, Zhou XX. Gamma-Ray Observation of the Cygnus Region in the 100-TeV Energy Region. PHYSICAL REVIEW LETTERS 2021; 127:031102. [PMID: 34328784 DOI: 10.1103/physrevlett.127.031102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 04/30/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
We report observations of gamma-ray emissions with energies in the 100-TeV energy region from the Cygnus region in our Galaxy. Two sources are significantly detected in the directions of the Cygnus OB1 and OB2 associations. Based on their positional coincidences, we associate one with a pulsar PSR J2032+4127 and the other mainly with a pulsar wind nebula PWN G75.2+0.1, with the pulsar moving away from its original birthplace situated around the centroid of the observed gamma-ray emission. This work would stimulate further studies of particle acceleration mechanisms at these gamma-ray sources.
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Affiliation(s)
- M Amenomori
- Department of Physics, Hirosaki University, Hirosaki 036-8561, Japan
| | - Y W Bao
- School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China
| | - X J Bi
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - D Chen
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - T L Chen
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - W Y Chen
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Xu Chen
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Y Chen
- School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China
| | - S W Cui
- Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
| | - L K Ding
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - J H Fang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - K Fang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - C F Feng
- Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao 266237, China
| | - Zhaoyang Feng
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Z Y Feng
- Institute of Modern Physics, SouthWest Jiaotong University, Chengdu 610031, China
| | - Qi Gao
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - A Gomi
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - Q B Gou
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Y Q Guo
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Y Y Guo
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - H H He
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Z T He
- Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
| | - K Hibino
- Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan
| | - N Hotta
- Faculty of Education, Utsunomiya University, Utsunomiya 321-8505, Japan
| | - Haibing Hu
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - H B Hu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - J Huang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - H Y Jia
- Institute of Modern Physics, SouthWest Jiaotong University, Chengdu 610031, China
| | - L Jiang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - P Jiang
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - H B Jin
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - K Kasahara
- Faculty of Systems Engineering, Shibaura Institute of Technology, Omiya 330-8570, Japan
| | - Y Katayose
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - C Kato
- Department of Physics, Shinshu University, Matsumoto 390-8621, Japan
| | - S Kato
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - K Kawata
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - M Kozai
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara 252-5210, Japan
| | - D Kurashige
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - G M Le
- National Center for Space Weather, China Meteorological Administration, Beijing 100081, China
| | - A F Li
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao 266237, China
- School of Information Science and Engineering, Shandong Agriculture University, Taian 271018, China
| | - H J Li
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - W J Li
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- Institute of Modern Physics, SouthWest Jiaotong University, Chengdu 610031, China
| | - Y Li
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - Y H Lin
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - B Liu
- Department of Astronomy, School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - C Liu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - J S Liu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - L Y Liu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - M Y Liu
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - W Liu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - X L Liu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - Y-Q Lou
- Department of Physics and Tsinghua Centre for Astrophysics (THCA), Tsinghua University, Beijing 100084, China
- Tsinghua University-National Astronomical Observatories of China (NAOC) Joint Research Center for Astrophysics, Tsinghua University, Beijing 100084, China
- Department of Astronomy, Tsinghua University, Beijing 100084, China
| | - H Lu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - X R Meng
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - K Munakata
- Department of Physics, Shinshu University, Matsumoto 390-8621, Japan
| | - H Nakada
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - Y Nakamura
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - Y Nakazawa
- College of Industrial Technology, Nihon University, Narashino 275-8575, Japan
| | - H Nanjo
- Department of Physics, Hirosaki University, Hirosaki 036-8561, Japan
| | - C C Ning
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - M Nishizawa
- National Institute of Informatics, Tokyo 101-8430, Japan
| | - M Ohnishi
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - T Ohura
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - S Okukawa
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - S Ozawa
- National Institute of Information and Communications Technology, Tokyo 184-8795, Japan
| | - L Qian
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - X Qian
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - X L Qian
- Department of Mechanical and Electrical Engineering, Shangdong Management University, Jinan 250357, China
| | - X B Qu
- College of Science, China University of Petroleum, Qingdao 266555, China
| | - T Saito
- Tokyo Metropolitan College of Industrial Technology, Tokyo 116-8523, Japan
| | - M Sakata
- Department of Physics, Konan University, Kobe 658-8501, Japan
| | - T Sako
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - T K Sako
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - J Shao
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao 266237, China
| | - M Shibata
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - A Shiomi
- College of Industrial Technology, Nihon University, Narashino 275-8575, Japan
| | - H Sugimoto
- Shonan Institute of Technology, Fujisawa 251-8511, Japan
| | - W Takano
- Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan
| | - M Takita
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - Y H Tan
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - N Tateyama
- Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan
| | - S Torii
- Research Institute for Science and Engineering, Waseda University, Tokyo 162-0044, Japan
| | - H Tsuchiya
- Japan Atomic Energy Agency, Tokai-mura 319-1195, Japan
| | - S Udo
- Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan
| | - H Wang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Y P Wang
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - H R Wu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Q Wu
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - J L Xu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - L Xue
- Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao 266237, China
| | - Y Yamamoto
- Department of Physics, Konan University, Kobe 658-8501, Japan
| | - Z Yang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Y Q Yao
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - J Yin
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - Y Yokoe
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - N P Yu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - A F Yuan
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - L M Zhai
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - C P Zhang
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - H M Zhang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - J L Zhang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - X Zhang
- School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China
| | - X Y Zhang
- Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao 266237, China
| | - Y Zhang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Yi Zhang
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, China
| | - Ying Zhang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - S P Zhao
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - X X Zhou
- Institute of Modern Physics, SouthWest Jiaotong University, Chengdu 610031, China
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Abstract
PSR B1259-63 is a gamma-ray binary system hosting a radio pulsar orbiting around a O9.5Ve star, LS 2883, with a period of ∼3.4 years. The interaction of the pulsar wind with the LS 2883 outflow leads to unpulsed broadband emission in the radio, X-ray, GeV, and TeV domains. One of the most unusual features of the system is an outburst of GeV energies around the periastron, during which the energy release substantially exceeds the spin down luminosity under the assumption of the isotropic emission. In this paper, we present the first results of a recent multi-wavelength campaign (radio, optical, and X-ray bands) accompanied by the analysis of publicly available GeV Fermi/LAT data. The campaign covered a period of more than 100 days around the 2021 periastron and revealed substantial differences from previously observed passages. We report a major delay of the GeV flare, weaker X-ray flux during the peaks, which are typically attributed to the times when the pulsar crosses the disk, and the appearance of a third X-ray peak never observed before. We argue that these features are consistent with the emission cone model proposed by us previously, in the case of a sparser and clumpier disk of the Be star.
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34
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Aharonian F, An Q, Bai LX, Bai YX, Bao YW, Bastieri D, Bi XJ, Bi YJ, Cai H, Cai JT, Cao Z, Cao Z, Chang J, Chang JF, Chang XC, Chen BM, Chen J, Chen L, Chen L, Chen L, Chen MJ, Chen ML, Chen QH, Chen SH, Chen SZ, Chen TL, Chen XL, Chen Y, Cheng N, Cheng YD, Cui SW, Cui XH, Cui YD, Dai BZ, Dai HL, Dai ZG, Della Volpe D, D'Ettorre Piazzoli B, Dong XJ, Fan JH, Fan YZ, Fan ZX, Fang J, Fang K, Feng CF, Feng L, Feng SH, Feng YL, Gao B, Gao CD, Gao Q, Gao W, Ge MM, Geng LS, Gong GH, Gou QB, Gu MH, Guo JG, Guo XL, Guo YQ, Guo YY, Han YA, He HH, He HN, He JC, He SL, He XB, He Y, Heller M, Hor YK, Hou C, Hou X, Hu HB, Hu S, Hu SC, Hu XJ, Huang DH, Huang QL, Huang WH, Huang XT, Huang ZC, Ji F, Ji XL, Jia HY, Jiang K, Jiang ZJ, Jin C, Kuleshov D, Levochkin K, Li BB, Li C, Li C, Li F, Li HB, Li HC, Li HY, Li J, Li K, Li WL, Li X, Li X, Li XR, Li Y, Li YZ, Li Z, Li Z, Liang EW, Liang YF, Lin SJ, Liu B, Liu C, Liu D, Liu H, Liu HD, Liu J, Liu JL, Liu JS, Liu JY, Liu MY, Liu RY, Liu SM, Liu W, Liu YN, Liu ZX, Long WJ, Lu R, Lv HK, Ma BQ, Ma LL, Ma XH, Mao JR, Masood A, Mitthumsiri W, Montaruli T, Nan YC, Pang BY, Pattarakijwanich P, Pei ZY, Qi MY, Ruffolo D, Rulev V, Sáiz A, Shao L, Shchegolev O, Sheng XD, Shi JR, Song HC, Stenkin YV, Stepanov V, Sun QN, Sun XN, Sun ZB, Tam PHT, Tang ZB, Tian WW, Wang BD, Wang C, Wang H, Wang HG, Wang JC, Wang JS, Wang LP, Wang LY, Wang RN, Wang W, Wang W, Wang XG, Wang XJ, Wang XY, Wang YD, Wang YJ, Wang YP, Wang Z, Wang Z, Wang ZH, Wang ZX, Wei DM, Wei JJ, Wei YJ, Wen T, Wu CY, Wu HR, Wu S, Wu WX, Wu XF, Xi SQ, Xia J, Xia JJ, Xiang GM, Xiao G, Xiao HB, Xin GG, Xin YL, Xing Y, Xu DL, Xu RX, Xue L, Yan DH, Yang CW, Yang FF, Yang JY, Yang LL, Yang MJ, Yang RZ, Yang SB, Yao YH, Yao ZG, Ye YM, Yin LQ, Yin N, You XH, You ZY, Yu YH, Yuan Q, Zeng HD, Zeng TX, Zeng W, Zeng ZK, Zha M, Zhai XX, Zhang BB, Zhang HM, Zhang HY, Zhang JL, Zhang JW, Zhang L, Zhang L, Zhang LX, Zhang PF, Zhang PP, Zhang R, Zhang SR, Zhang SS, Zhang X, Zhang XP, Zhang Y, Zhang Y, Zhang YF, Zhang YL, Zhao B, Zhao J, Zhao L, Zhao LZ, Zhao SP, Zheng F, Zheng Y, Zhou B, Zhou H, Zhou JN, Zhou P, Zhou R, Zhou XX, Zhu CG, Zhu FR, Zhu H, Zhu KJ, Zuo X, Huang XY. Extended Very-High-Energy Gamma-Ray Emission Surrounding PSR J0622+3749 Observed by LHAASO-KM2A. PHYSICAL REVIEW LETTERS 2021; 126:241103. [PMID: 34213924 DOI: 10.1103/physrevlett.126.241103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/23/2021] [Accepted: 05/10/2021] [Indexed: 06/13/2023]
Abstract
We report the discovery of an extended very-high-energy (VHE) gamma-ray source around the location of the middle-aged (207.8 kyr) pulsar PSR J0622+3749 with the Large High-Altitude Air Shower Observatory (LHAASO). The source is detected with a significance of 8.2σ for E>25 TeV assuming a Gaussian template. The best-fit location is (right ascension, declination) =(95.47°±0.11°,37.92°±0.09°), and the extension is 0.40°±0.07°. The energy spectrum can be described by a power-law spectrum with an index of -2.92±0.17_{stat}±0.02_{sys}. No clear extended multiwavelength counterpart of the LHAASO source has been found from the radio to sub-TeV bands. The LHAASO observations are consistent with the scenario that VHE electrons escaped from the pulsar, diffused in the interstellar medium, and scattered the interstellar radiation field. If interpreted as the pulsar halo scenario, the diffusion coefficient, inferred for electrons with median energies of ∼160 TeV, is consistent with those obtained from the extended halos around Geminga and Monogem and much smaller than that derived from cosmic ray secondaries. The LHAASO discovery of this source thus likely enriches the class of so-called pulsar halos and confirms that high-energy particles generally diffuse very slowly in the disturbed medium around pulsars.
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Affiliation(s)
- F Aharonian
- Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, 2 Dublin, Ireland
- Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, 69029 Heidelberg, Germany
| | - Q An
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
- University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - L X Bai
- College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China
| | - Y X Bai
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y W Bao
- School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China
| | - D Bastieri
- Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China
| | - X J Bi
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y J Bi
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - H Cai
- School of Physics and Technology, Wuhan University, 430072 Wuhan, Hubei, China
| | - J T Cai
- Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China
| | - Z Cao
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Z Cao
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
- University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - J Chang
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - J F Chang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - X C Chang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - B M Chen
- Hebei Normal University, 050024 Shijiazhuang, Hebei, China
| | - J Chen
- College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China
| | - L Chen
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - L Chen
- Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 200030 Shanghai, China
| | - L Chen
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - M J Chen
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - M L Chen
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - Q H Chen
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - S H Chen
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - S Z Chen
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - T L Chen
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, 850000 Lhasa, Tibet, China
| | - X L Chen
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y Chen
- School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China
| | - N Cheng
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y D Cheng
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - S W Cui
- Hebei Normal University, 050024 Shijiazhuang, Hebei, China
| | - X H Cui
- National Astronomical Observatories, Chinese Academy of Sciences, 100101 Beijing, China
| | - Y D Cui
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519082 Zhuhai, Guangdong, China
| | - B Z Dai
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - H L Dai
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - Z G Dai
- School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China
| | - D Della Volpe
- Département de Physique Nucléaire et Corpusculaire, Faculté de Sciences, Université de Genève, 24 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - B D'Ettorre Piazzoli
- Dipartimento di Fisica dell'Università di Napoli "Federico II," Complesso Universitario di Monte Sant'Angelo, via Cinthia, 80126 Napoli, Italy
| | - X J Dong
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - J H Fan
- Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China
| | - Y Z Fan
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - Z X Fan
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - J Fang
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - K Fang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - C F Feng
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - L Feng
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - S H Feng
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y L Feng
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - B Gao
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - C D Gao
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - Q Gao
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, 850000 Lhasa, Tibet, China
| | - W Gao
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - M M Ge
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - L S Geng
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - G H Gong
- Department of Engineering Physics, Tsinghua University, 100084 Beijing, China
| | - Q B Gou
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - M H Gu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - J G Guo
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - X L Guo
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - Y Q Guo
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y Y Guo
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - Y A Han
- School of Physics and Microelectronics, Zhengzhou University, 450001 Zhengzhou, Henan, China
| | - H H He
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - H N He
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - J C He
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - S L He
- Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China
| | - X B He
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519082 Zhuhai, Guangdong, China
| | - Y He
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - M Heller
- Département de Physique Nucléaire et Corpusculaire, Faculté de Sciences, Université de Genève, 24 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Y K Hor
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519082 Zhuhai, Guangdong, China
| | - C Hou
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - X Hou
- Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, Yunnan, China
| | - H B Hu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - S Hu
- College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China
| | - S C Hu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - X J Hu
- Department of Engineering Physics, Tsinghua University, 100084 Beijing, China
| | - D H Huang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - Q L Huang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - W H Huang
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - X T Huang
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - Z C Huang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - F Ji
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - X L Ji
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - H Y Jia
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - K Jiang
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
- University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - Z J Jiang
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - C Jin
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - D Kuleshov
- Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia
| | - K Levochkin
- Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia
| | - B B Li
- Hebei Normal University, 050024 Shijiazhuang, Hebei, China
| | - C Li
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - C Li
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
- University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - F Li
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - H B Li
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - H C Li
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - H Y Li
- University of Science and Technology of China, 230026 Hefei, Anhui, China
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - J Li
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - K Li
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - W L Li
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - X Li
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
- University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - X Li
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - X R Li
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y Li
- College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China
| | - Y Z Li
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Z Li
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Z Li
- School of Physics, Peking University, 100871 Beijing, China
| | - E W Liang
- School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, China
| | - Y F Liang
- School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, China
| | - S J Lin
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519082 Zhuhai, Guangdong, China
| | - B Liu
- University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - C Liu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - D Liu
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - H Liu
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - H D Liu
- School of Physics and Microelectronics, Zhengzhou University, 450001 Zhengzhou, Henan, China
| | - J Liu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - J L Liu
- Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, China
| | - J S Liu
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519082 Zhuhai, Guangdong, China
| | - J Y Liu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - M Y Liu
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, 850000 Lhasa, Tibet, China
| | - R Y Liu
- School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China
| | - S M Liu
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - W Liu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y N Liu
- Department of Engineering Physics, Tsinghua University, 100084 Beijing, China
| | - Z X Liu
- College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China
| | - W J Long
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - R Lu
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - H K Lv
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - B Q Ma
- School of Physics, Peking University, 100871 Beijing, China
| | - L L Ma
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - X H Ma
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - J R Mao
- Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, Yunnan, China
| | - A Masood
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - W Mitthumsiri
- Department of Physics, Faculty of Science, Mahidol University, 10400 Bangkok, Thailand
| | - T Montaruli
- Département de Physique Nucléaire et Corpusculaire, Faculté de Sciences, Université de Genève, 24 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Y C Nan
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - B Y Pang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - P Pattarakijwanich
- Department of Physics, Faculty of Science, Mahidol University, 10400 Bangkok, Thailand
| | - Z Y Pei
- Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China
| | - M Y Qi
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - D Ruffolo
- Department of Physics, Faculty of Science, Mahidol University, 10400 Bangkok, Thailand
| | - V Rulev
- Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia
| | - A Sáiz
- Department of Physics, Faculty of Science, Mahidol University, 10400 Bangkok, Thailand
| | - L Shao
- Hebei Normal University, 050024 Shijiazhuang, Hebei, China
| | - O Shchegolev
- Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia
- Moscow Institute of Physics and Technology, 141700 Moscow, Russia
| | - X D Sheng
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - J R Shi
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - H C Song
- School of Physics, Peking University, 100871 Beijing, China
| | - Yu V Stenkin
- Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia
- Moscow Institute of Physics and Technology, 141700 Moscow, Russia
| | - V Stepanov
- Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia
| | - Q N Sun
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - X N Sun
- School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, China
| | - Z B Sun
- National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, China
| | - P H T Tam
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519082 Zhuhai, Guangdong, China
| | - Z B Tang
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
- University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - W W Tian
- University of Chinese Academy of Sciences, 100049 Beijing, China
- National Astronomical Observatories, Chinese Academy of Sciences, 100101 Beijing, China
| | - B D Wang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - C Wang
- National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, China
| | - H Wang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - H G Wang
- Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China
| | - J C Wang
- Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, Yunnan, China
| | - J S Wang
- Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, China
| | - L P Wang
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - L Y Wang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - R N Wang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - W Wang
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519082 Zhuhai, Guangdong, China
| | - W Wang
- School of Physics and Technology, Wuhan University, 430072 Wuhan, Hubei, China
| | - X G Wang
- School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, China
| | - X J Wang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - X Y Wang
- School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China
| | - Y D Wang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y J Wang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y P Wang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Z Wang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - Z Wang
- Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, China
| | - Z H Wang
- College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China
| | - Z X Wang
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - D M Wei
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - J J Wei
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - Y J Wei
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - T Wen
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - C Y Wu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - H R Wu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - S Wu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - W X Wu
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - X F Wu
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - S Q Xi
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - J Xia
- University of Science and Technology of China, 230026 Hefei, Anhui, China
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - J J Xia
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - G M Xiang
- University of Chinese Academy of Sciences, 100049 Beijing, China
- Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 200030 Shanghai, China
| | - G Xiao
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - H B Xiao
- Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China
| | - G G Xin
- School of Physics and Technology, Wuhan University, 430072 Wuhan, Hubei, China
| | - Y L Xin
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - Y Xing
- Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 200030 Shanghai, China
| | - D L Xu
- Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, China
| | - R X Xu
- School of Physics, Peking University, 100871 Beijing, China
| | - L Xue
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - D H Yan
- Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, Yunnan, China
| | - C W Yang
- College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China
| | - F F Yang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - J Y Yang
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519082 Zhuhai, Guangdong, China
| | - L L Yang
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519082 Zhuhai, Guangdong, China
| | - M J Yang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - R Z Yang
- University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - S B Yang
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - Y H Yao
- College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China
| | - Z G Yao
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y M Ye
- Department of Engineering Physics, Tsinghua University, 100084 Beijing, China
| | - L Q Yin
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - N Yin
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - X H You
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Z Y You
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y H Yu
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - Q Yuan
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - H D Zeng
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - T X Zeng
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - W Zeng
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - Z K Zeng
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - M Zha
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - X X Zhai
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - B B Zhang
- School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China
| | - H M Zhang
- School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China
| | - H Y Zhang
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - J L Zhang
- National Astronomical Observatories, Chinese Academy of Sciences, 100101 Beijing, China
| | - J W Zhang
- College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China
| | - L Zhang
- Hebei Normal University, 050024 Shijiazhuang, Hebei, China
| | - L Zhang
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - L X Zhang
- Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China
| | - P F Zhang
- School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China
| | - P P Zhang
- Hebei Normal University, 050024 Shijiazhuang, Hebei, China
| | - R Zhang
- University of Science and Technology of China, 230026 Hefei, Anhui, China
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - S R Zhang
- Hebei Normal University, 050024 Shijiazhuang, Hebei, China
| | - S S Zhang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - X Zhang
- School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China
| | - X P Zhang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y Zhang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - Y Zhang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
| | - Y F Zhang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - Y L Zhang
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - B Zhao
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - J Zhao
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - L Zhao
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
- University of Science and Technology of China, 230026 Hefei, Anhui, China
| | - L Z Zhao
- Hebei Normal University, 050024 Shijiazhuang, Hebei, China
| | - S P Zhao
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - F Zheng
- National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, China
| | - Y Zheng
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - B Zhou
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - H Zhou
- Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, China
| | - J N Zhou
- Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 200030 Shanghai, China
| | - P Zhou
- School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China
| | - R Zhou
- College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China
| | - X X Zhou
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - C G Zhu
- Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China
| | - F R Zhu
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China
| | - H Zhu
- National Astronomical Observatories, Chinese Academy of Sciences, 100101 Beijing, China
| | - K J Zhu
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
- State Key Laboratory of Particle Detection and Electronics, 100049 Beijing, China
| | - X Zuo
- Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
- TIANFU Cosmic Ray Research Center, Chengdu, 610000 Sichuan, China
| | - X Y Huang
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China
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Di Mauro M, Winkler MW. Multimessenger constraints on the dark matter interpretation of the
Fermi
-LAT Galactic Center excess. Int J Clin Exp Med 2021. [DOI: 10.1103/physrevd.103.123005] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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36
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Cao Z, Aharonian FA, An Q, Axikegu, Bai LX, Bai YX, Bao YW, Bastieri D, Bi XJ, Bi YJ, Cai H, Cai JT, Cao Z, Chang J, Chang JF, Chang XC, Chen BM, Chen J, Chen L, Chen L, Chen L, Chen MJ, Chen ML, Chen QH, Chen SH, Chen SZ, Chen TL, Chen XL, Chen Y, Cheng N, Cheng YD, Cui SW, Cui XH, Cui YD, Dai BZ, Dai HL, Dai ZG, Danzengluobu, Della Volpe D, D Ettorre Piazzoli B, Dong XJ, Fan JH, Fan YZ, Fan ZX, Fang J, Fang K, Feng CF, Feng L, Feng SH, Feng YL, Gao B, Gao CD, Gao Q, Gao W, Ge MM, Geng LS, Gong GH, Gou QB, Gu MH, Guo JG, Guo XL, Guo YQ, Guo YY, Han YA, He HH, He HN, He JC, He SL, He XB, He Y, Heller M, Hor YK, Hou C, Hou X, Hu HB, Hu S, Hu SC, Hu XJ, Huang DH, Huang QL, Huang WH, Huang XT, Huang ZC, Ji F, Ji XL, Jia HY, Jiang K, Jiang ZJ, Jin C, Kuleshov D, Levochkin K, Li BB, Li C, Li C, Li F, Li HB, Li HC, Li HY, Li J, Li K, Li WL, Li X, Li X, Li XR, Li Y, Li YZ, Li Z, Li Z, Liang EW, Liang YF, Lin SJ, Liu B, Liu C, Liu D, Liu H, Liu HD, Liu J, Liu JL, Liu JS, Liu JY, Liu MY, Liu RY, Liu SM, Liu W, Liu YN, Liu ZX, Long WJ, Lu R, Lv HK, Ma BQ, Ma LL, Ma XH, Mao JR, Masood A, Mitthumsiri W, Montaruli T, Nan YC, Pang BY, Pattarakijwanich P, Pei ZY, Qi MY, Ruffolo D, Rulev V, Sáiz A, Shao L, Shchegolev O, Sheng XD, Shi JR, Song HC, Stenkin YV, Stepanov V, Sun QN, Sun XN, Sun ZB, Tam PHT, Tang ZB, Tian WW, Wang BD, Wang C, Wang H, Wang HG, Wang JC, Wang JS, Wang LP, Wang LY, Wang RN, Wang W, Wang W, Wang XG, Wang XJ, Wang XY, Wang YD, Wang YJ, Wang YP, Wang Z, Wang Z, Wang ZH, Wang ZX, Wei DM, Wei JJ, Wei YJ, Wen T, Wu CY, Wu HR, Wu S, Wu WX, Wu XF, Xi SQ, Xia J, Xia JJ, Xiang GM, Xiao G, Xiao HB, Xin GG, Xin YL, Xing Y, Xu DL, Xu RX, Xue L, Yan DH, Yang CW, Yang FF, Yang JY, Yang LL, Yang MJ, Yang RZ, Yang SB, Yao YH, Yao ZG, Ye YM, Yin LQ, Yin N, You XH, You ZY, Yu YH, Yuan Q, Zeng HD, Zeng TX, Zeng W, Zeng ZK, Zha M, Zhai XX, Zhang BB, Zhang HM, Zhang HY, Zhang JL, Zhang JW, Zhang L, Zhang L, Zhang LX, Zhang PF, Zhang PP, Zhang R, Zhang SR, Zhang SS, Zhang X, Zhang XP, Zhang Y, Zhang Y, Zhang YF, Zhang YL, Zhao B, Zhao J, Zhao L, Zhao LZ, Zhao SP, Zheng F, Zheng Y, Zhou B, Zhou H, Zhou JN, Zhou P, Zhou R, Zhou XX, Zhu CG, Zhu FR, Zhu H, Zhu KJ, Zuo X. Ultrahigh-energy photons up to 1.4 petaelectronvolts from 12 γ-ray Galactic sources. Nature 2021; 594:33-36. [PMID: 34002091 DOI: 10.1038/s41586-021-03498-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 03/26/2021] [Indexed: 02/04/2023]
Abstract
The extension of the cosmic-ray spectrum beyond 1 petaelectronvolt (PeV; 1015 electronvolts) indicates the existence of the so-called PeVatrons-cosmic-ray factories that accelerate particles to PeV energies. We need to locate and identify such objects to find the origin of Galactic cosmic rays1. The principal signature of both electron and proton PeVatrons is ultrahigh-energy (exceeding 100 TeV) γ radiation. Evidence of the presence of a proton PeVatron has been found in the Galactic Centre, according to the detection of a hard-spectrum radiation extending to 0.04 PeV (ref. 2). Although γ-rays with energies slightly higher than 0.1 PeV have been reported from a few objects in the Galactic plane3-6, unbiased identification and in-depth exploration of PeVatrons requires detection of γ-rays with energies well above 0.1 PeV. Here we report the detection of more than 530 photons at energies above 100 teraelectronvolts and up to 1.4 PeV from 12 ultrahigh-energy γ-ray sources with a statistical significance greater than seven standard deviations. Despite having several potential counterparts in their proximity, including pulsar wind nebulae, supernova remnants and star-forming regions, the PeVatrons responsible for the ultrahigh-energy γ-rays have not yet been firmly localized and identified (except for the Crab Nebula), leaving open the origin of these extreme accelerators.
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Affiliation(s)
- Zhen Cao
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China. .,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China. .,University of Chinese Academy of Sciences, Beijing, China.
| | - F A Aharonian
- Dublin Institute for Advanced Studies, Dublin, Ireland. .,Max-Planck-Institut for Nuclear Physics, Heidelberg, Germany.
| | - Q An
- State Key Laboratory of Particle Detection and Electronics, Beijing, China.,University of Science and Technology of China, Hefei, China
| | - Axikegu
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - L X Bai
- College of Physics, Sichuan University, Chengdu, China
| | - Y X Bai
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Y W Bao
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - D Bastieri
- Center for Astrophysics, Guangzhou University, Guangzhou, China
| | - X J Bi
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Y J Bi
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - H Cai
- School of Physics and Technology, Wuhan University, Wuhan, China
| | - J T Cai
- Center for Astrophysics, Guangzhou University, Guangzhou, China
| | - Zhe Cao
- State Key Laboratory of Particle Detection and Electronics, Beijing, China.,University of Science and Technology of China, Hefei, China
| | - J Chang
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - J F Chang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,State Key Laboratory of Particle Detection and Electronics, Beijing, China
| | - X C Chang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - B M Chen
- Hebei Normal University, Shijiazhuang, China
| | - J Chen
- College of Physics, Sichuan University, Chengdu, China
| | - L Chen
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Liang Chen
- Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, China
| | - Long Chen
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - M J Chen
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - M L Chen
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,State Key Laboratory of Particle Detection and Electronics, Beijing, China
| | - Q H Chen
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - S H Chen
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - S Z Chen
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China. .,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.
| | - T L Chen
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa, Tibet, China
| | - X L Chen
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Y Chen
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - N Cheng
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Y D Cheng
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - S W Cui
- Hebei Normal University, Shijiazhuang, China
| | - X H Cui
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
| | - Y D Cui
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, Zhuhai, China
| | - B Z Dai
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - H L Dai
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - Z G Dai
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - Danzengluobu
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa, Tibet, China
| | - D Della Volpe
- Département de Physique Nucléaire et Corpusculaire, Faculté de Sciences, Université de Genève, Geneva, Switzerland
| | - B D Ettorre Piazzoli
- Dipartimento di Fisica dell'Università di Napoli "Federico II", Complesso Universitario di Monte Sant'Angelo, Naples, Italy
| | - X J Dong
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - J H Fan
- Center for Astrophysics, Guangzhou University, Guangzhou, China
| | - Y Z Fan
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - Z X Fan
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - J Fang
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - K Fang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - C F Feng
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - L Feng
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - S H Feng
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Y L Feng
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - B Gao
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - C D Gao
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - Q Gao
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa, Tibet, China
| | - W Gao
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - M M Ge
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - L S Geng
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - G H Gong
- Department of Engineering Physics, Tsinghua University, Beijing, China
| | - Q B Gou
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - M H Gu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,State Key Laboratory of Particle Detection and Electronics, Beijing, China
| | - J G Guo
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - X L Guo
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - Y Q Guo
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Y Y Guo
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China.,Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - Y A Han
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, China
| | - H H He
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - H N He
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - J C He
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - S L He
- Center for Astrophysics, Guangzhou University, Guangzhou, China
| | - X B He
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, Zhuhai, China
| | - Y He
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - M Heller
- Département de Physique Nucléaire et Corpusculaire, Faculté de Sciences, Université de Genève, Geneva, Switzerland
| | - Y K Hor
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, Zhuhai, China
| | - C Hou
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - X Hou
- Yunnan Observatories, Chinese Academy of Sciences, Kunming, China
| | - H B Hu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - S Hu
- College of Physics, Sichuan University, Chengdu, China
| | - S C Hu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - X J Hu
- Department of Engineering Physics, Tsinghua University, Beijing, China
| | - D H Huang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - Q L Huang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - W H Huang
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - X T Huang
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - Z C Huang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - F Ji
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - X L Ji
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,State Key Laboratory of Particle Detection and Electronics, Beijing, China
| | - H Y Jia
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - K Jiang
- State Key Laboratory of Particle Detection and Electronics, Beijing, China.,University of Science and Technology of China, Hefei, China
| | - Z J Jiang
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - C Jin
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - D Kuleshov
- Institute for Nuclear Research of Russian Academy of Sciences, Moscow, Russia
| | - K Levochkin
- Institute for Nuclear Research of Russian Academy of Sciences, Moscow, Russia
| | - B B Li
- Hebei Normal University, Shijiazhuang, China
| | - Cong Li
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Cheng Li
- State Key Laboratory of Particle Detection and Electronics, Beijing, China.,University of Science and Technology of China, Hefei, China
| | - F Li
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,State Key Laboratory of Particle Detection and Electronics, Beijing, China
| | - H B Li
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - H C Li
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - H Y Li
- University of Science and Technology of China, Hefei, China.,Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - J Li
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,State Key Laboratory of Particle Detection and Electronics, Beijing, China
| | - K Li
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - W L Li
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - X Li
- State Key Laboratory of Particle Detection and Electronics, Beijing, China.,University of Science and Technology of China, Hefei, China
| | - Xin Li
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - X R Li
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Y Li
- College of Physics, Sichuan University, Chengdu, China
| | - Y Z Li
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Zhe Li
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Zhuo Li
- School of Physics, Peking University, Beijing, China
| | - E W Liang
- School of Physical Science and Technology, Guangxi University, Nanning, China
| | - Y F Liang
- School of Physical Science and Technology, Guangxi University, Nanning, China
| | - S J Lin
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, Zhuhai, China
| | - B Liu
- University of Science and Technology of China, Hefei, China
| | - C Liu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - D Liu
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - H Liu
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - H D Liu
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, China
| | - J Liu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - J L Liu
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, China.,School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China
| | - J S Liu
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, Zhuhai, China
| | - J Y Liu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - M Y Liu
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa, Tibet, China
| | - R Y Liu
- School of Astronomy and Space Science, Nanjing University, Nanjing, China.
| | - S M Liu
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - W Liu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Y N Liu
- Department of Engineering Physics, Tsinghua University, Beijing, China
| | - Z X Liu
- College of Physics, Sichuan University, Chengdu, China
| | - W J Long
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - R Lu
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - H K Lv
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - B Q Ma
- School of Physics, Peking University, Beijing, China
| | - L L Ma
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - X H Ma
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - J R Mao
- Yunnan Observatories, Chinese Academy of Sciences, Kunming, China
| | - A Masood
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - W Mitthumsiri
- Department of Physics, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - T Montaruli
- Département de Physique Nucléaire et Corpusculaire, Faculté de Sciences, Université de Genève, Geneva, Switzerland
| | - Y C Nan
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - B Y Pang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - P Pattarakijwanich
- Department of Physics, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Z Y Pei
- Center for Astrophysics, Guangzhou University, Guangzhou, China
| | - M Y Qi
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - D Ruffolo
- Department of Physics, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - V Rulev
- Institute for Nuclear Research of Russian Academy of Sciences, Moscow, Russia
| | - A Sáiz
- Department of Physics, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - L Shao
- Hebei Normal University, Shijiazhuang, China
| | - O Shchegolev
- Institute for Nuclear Research of Russian Academy of Sciences, Moscow, Russia.,Moscow Institute of Physics and Technology, Moscow, Russia
| | - X D Sheng
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - J R Shi
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - H C Song
- School of Physics, Peking University, Beijing, China
| | - Yu V Stenkin
- Institute for Nuclear Research of Russian Academy of Sciences, Moscow, Russia.,Moscow Institute of Physics and Technology, Moscow, Russia
| | - V Stepanov
- Institute for Nuclear Research of Russian Academy of Sciences, Moscow, Russia
| | - Q N Sun
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - X N Sun
- School of Physical Science and Technology, Guangxi University, Nanning, China
| | - Z B Sun
- National Space Science Center, Chinese Academy of Sciences, Beijing, China
| | - P H T Tam
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, Zhuhai, China
| | - Z B Tang
- State Key Laboratory of Particle Detection and Electronics, Beijing, China.,University of Science and Technology of China, Hefei, China
| | - W W Tian
- University of Chinese Academy of Sciences, Beijing, China.,National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
| | - B D Wang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - C Wang
- National Space Science Center, Chinese Academy of Sciences, Beijing, China
| | - H Wang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - H G Wang
- Center for Astrophysics, Guangzhou University, Guangzhou, China
| | - J C Wang
- Yunnan Observatories, Chinese Academy of Sciences, Kunming, China
| | - J S Wang
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, China.,School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China
| | - L P Wang
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - L Y Wang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - R N Wang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - W Wang
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, Zhuhai, China
| | - W Wang
- School of Physics and Technology, Wuhan University, Wuhan, China
| | - X G Wang
- School of Physical Science and Technology, Guangxi University, Nanning, China
| | - X J Wang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - X Y Wang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - Y D Wang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Y J Wang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Y P Wang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Zheng Wang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,State Key Laboratory of Particle Detection and Electronics, Beijing, China
| | - Zhen Wang
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, China.,School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China
| | - Z H Wang
- College of Physics, Sichuan University, Chengdu, China
| | - Z X Wang
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - D M Wei
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - J J Wei
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - Y J Wei
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - T Wen
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - C Y Wu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - H R Wu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - S Wu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - W X Wu
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - X F Wu
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - S Q Xi
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - J Xia
- University of Science and Technology of China, Hefei, China.,Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - J J Xia
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - G M Xiang
- University of Chinese Academy of Sciences, Beijing, China.,Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, China
| | - G Xiao
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - H B Xiao
- Center for Astrophysics, Guangzhou University, Guangzhou, China
| | - G G Xin
- School of Physics and Technology, Wuhan University, Wuhan, China
| | - Y L Xin
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - Y Xing
- Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, China
| | - D L Xu
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, China.,School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China
| | - R X Xu
- School of Physics, Peking University, Beijing, China
| | - L Xue
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - D H Yan
- Yunnan Observatories, Chinese Academy of Sciences, Kunming, China
| | - C W Yang
- College of Physics, Sichuan University, Chengdu, China
| | - F F Yang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,State Key Laboratory of Particle Detection and Electronics, Beijing, China
| | - J Y Yang
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, Zhuhai, China
| | - L L Yang
- School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, Zhuhai, China
| | - M J Yang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - R Z Yang
- University of Science and Technology of China, Hefei, China.
| | - S B Yang
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - Y H Yao
- College of Physics, Sichuan University, Chengdu, China
| | - Z G Yao
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Y M Ye
- Department of Engineering Physics, Tsinghua University, Beijing, China
| | - L Q Yin
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - N Yin
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - X H You
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Z Y You
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Y H Yu
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - Q Yuan
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - H D Zeng
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - T X Zeng
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,State Key Laboratory of Particle Detection and Electronics, Beijing, China
| | - W Zeng
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - Z K Zeng
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - M Zha
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - X X Zhai
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - B B Zhang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - H M Zhang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - H Y Zhang
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - J L Zhang
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
| | - J W Zhang
- College of Physics, Sichuan University, Chengdu, China
| | - L Zhang
- Hebei Normal University, Shijiazhuang, China
| | - Li Zhang
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - L X Zhang
- Center for Astrophysics, Guangzhou University, Guangzhou, China
| | - P F Zhang
- School of Physics and Astronomy, Yunnan University, Kunming, China
| | - P P Zhang
- Hebei Normal University, Shijiazhuang, China
| | - R Zhang
- University of Science and Technology of China, Hefei, China.,Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - S R Zhang
- Hebei Normal University, Shijiazhuang, China
| | - S S Zhang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - X Zhang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - X P Zhang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Yong Zhang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - Yi Zhang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - Y F Zhang
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - Y L Zhang
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - B Zhao
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - J Zhao
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - L Zhao
- State Key Laboratory of Particle Detection and Electronics, Beijing, China.,University of Science and Technology of China, Hefei, China
| | - L Z Zhao
- Hebei Normal University, Shijiazhuang, China
| | - S P Zhao
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China.,Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - F Zheng
- National Space Science Center, Chinese Academy of Sciences, Beijing, China
| | - Y Zheng
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - B Zhou
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
| | - H Zhou
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, China.,School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China
| | - J N Zhou
- Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, China
| | - P Zhou
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - R Zhou
- College of Physics, Sichuan University, Chengdu, China
| | - X X Zhou
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - C G Zhu
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
| | - F R Zhu
- School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
| | - H Zhu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
| | - K J Zhu
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China.,University of Chinese Academy of Sciences, Beijing, China.,State Key Laboratory of Particle Detection and Electronics, Beijing, China
| | - X Zuo
- Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.,TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
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Abstract
Continuum gamma-ray emission produced by interactions of cosmic rays with interstellar matter and radiation fields is a probe of non-thermal particle populations in galaxies. After decades of continuous improvements in experimental techniques and an ever-increasing sky and energy coverage, gamma-ray observations reveal in unprecedented detail the properties of galactic cosmic rays. A variety of scales and environments are now accessible to us, from the local interstellar medium near the Sun and the vicinity of cosmic-ray accelerators, out to the Milky Way at large and beyond, with a growing number of gamma-ray emitting star-forming galaxies. Gamma-ray observations have been pushing forward our understanding of the life cycle of cosmic rays in galaxies and, combined with advances in related domains, they have been challenging standard assumptions in the field and have spurred new developments in modelling approaches and data analysis methods. We provide a review of the status of the subject and discuss perspectives on future progress.
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39
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20 Years of Indian Gamma Ray Astronomy Using Imaging Cherenkov Telescopes and Road Ahead. UNIVERSE 2021. [DOI: 10.3390/universe7040096] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The field of ground-based γ-ray astronomy has made very significant advances over the last three decades with the extremely successful operations of several atmospheric Cherenkov telescopes worldwide. The advent of the imaging Cherenkov technique for indirect detection of cosmic γ rays has immensely contributed to this field with the discovery of more than 220 γ-ray sources in the Universe. This has greatly improved our understanding of the various astrophysical processes involved in the non-thermal emission at energies above 100 GeV. In this paper, we summarize the important results achieved by the Indian γ-ray astronomers from the GeV-TeV observations using imaging Cherenkov telescopes over the last two decades. We mainly emphasize the results obtained from the observations of active galactic nuclei with the TACTIC (TeV Atmospheric Cherenkov Telescope with Imaging Camera) telescope, which has been operational since 1997 at Mount Abu, India. We also discuss the future plans of the Indian γ-ray astronomy program with special focus on the scientific objectives of the recently installed 21 m diameter MACE (Major Atmospheric Cherenkov Experiment) telescope at Hanle, India.
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41
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List F, Rodd NL, Lewis GF, Bhat I. Galactic Center Excess in a New Light: Disentangling the γ-Ray Sky with Bayesian Graph Convolutional Neural Networks. PHYSICAL REVIEW LETTERS 2020; 125:241102. [PMID: 33412055 DOI: 10.1103/physrevlett.125.241102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/24/2020] [Accepted: 10/26/2020] [Indexed: 06/12/2023]
Abstract
A fundamental question regarding the Galactic Center excess (GCE) is whether the underlying structure is pointlike or smooth, often framed in terms of a millisecond pulsar or annihilating dark matter (DM) origin for the emission. We show that Bayesian neural networks (NNs) have the potential to resolve this debate. In simulated data, the method is able to predict the flux fractions from inner Galaxy emission components to on average ∼0.5%. When applied to the Fermi photon-count map, the NN identifies a smooth GCE in the data, suggestive of the presence of DM, with the estimates for the background templates being consistent with existing results.
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Affiliation(s)
- Florian List
- Sydney Institute for Astronomy, School of Physics, A28, The University of Sydney, New South Wales 2006, Australia
| | - Nicholas L Rodd
- Berkeley Center for Theoretical Physics, University of California, Berkeley, California 94720, USA
- Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Geraint F Lewis
- Sydney Institute for Astronomy, School of Physics, A28, The University of Sydney, New South Wales 2006, Australia
| | - Ishaan Bhat
- UMC Utrecht, Image Sciences Institute, 3508 GA Utrecht, The Netherlands
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42
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Boschini MJ, Torre SD, Gervasi M, Grandi D, Jóhannesson G, La Vacca G, Masi N, Moskalenko IV, Pensotti S, Porter TA, Quadrani L, Rancoita PG, Rozza D, Tacconi M. Inference of the Local Interstellar Spectra of Cosmic-Ray Nuclei Z ⩽ 28 with the GalProp-HelMod Framework. THE ASTROPHYSICAL JOURNAL. SUPPLEMENT SERIES 2020; 250:27. [PMID: 34711999 PMCID: PMC8549769 DOI: 10.3847/1538-4365/aba901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Composition and spectra of Galactic cosmic rays (CRs) are vital for studies of high-energy processes in a variety of environments and on different scales, for interpretation of γ-ray and microwave observations, for disentangling possible signatures of new phenomena, and for understanding of our local Galactic neighborhood. Since its launch, AMS-02 has delivered outstanding-quality measurements of the spectra of p ¯ , e ±, and nuclei: 1H-8O, 10Ne, 12Mg, 14Si. These measurements resulted in a number of breakthroughs; however, spectra of heavier nuclei and especially low-abundance nuclei are not expected until later in the mission. Meanwhile, a comparison of published AMS-02 results with earlier data from HEAO-3-C2 indicates that HEAO-3-C2 data may be affected by undocumented systematic errors. Utilizing such data to compensate for the lack of AMS-02 measurements could result in significant errors. In this paper we show that a fraction of HEAO-3-C2 data match available AMS-02 measurements quite well and can be used together with Voyager 1 and ACE-CRIS data to make predictions for the local interstellar spectra (LIS) of nuclei that are not yet released by AMS-02. We are also updating our already-published LIS to provide a complete set from 1H-28Ni in the energy range from 1 MeV nucleon-1 to ~100-500 TeV nucleon-1, thus covering 8-9 orders of magnitude in energy. Our calculations employ the GalProp-HelMod framework, which has proved to be a reliable tool in deriving the LIS of CR p ¯ , e -, and nuclei 1H-8O.
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Affiliation(s)
- M J Boschini
- INFN, Milano-Bicocca, Milano, Italy
- CINECA, Segrate, Milano, Italy
| | | | - M Gervasi
- INFN, Milano-Bicocca, Milano, Italy
- Physics Department, University of Milano-Bicocca, Milano, Italy
| | - D Grandi
- INFN, Milano-Bicocca, Milano, Italy
- Physics Department, University of Milano-Bicocca, Milano, Italy
| | - G Jóhannesson
- Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland
- NORDITA, Roslagstullsbacken 23, 106 91 Stockholm, Sweden
| | - G La Vacca
- INFN, Milano-Bicocca, Milano, Italy
- Physics Department, University of Milano-Bicocca, Milano, Italy
| | - N Masi
- INFN, Bologna, Italy
- Physics Department, University of Bologna, Bologna, Italy
| | - I V Moskalenko
- Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305, USA
- Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA
| | - S Pensotti
- INFN, Milano-Bicocca, Milano, Italy
- Physics Department, University of Milano-Bicocca, Milano, Italy
| | - T A Porter
- Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305, USA
- Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA
| | - L Quadrani
- INFN, Bologna, Italy
- Physics Department, University of Bologna, Bologna, Italy
| | | | - D Rozza
- INFN, Milano-Bicocca, Milano, Italy
- Physics Department, University of Milano-Bicocca, Milano, Italy
| | - M Tacconi
- INFN, Milano-Bicocca, Milano, Italy
- Physics Department, University of Milano-Bicocca, Milano, Italy
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43
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Leane RK, Slatyer TR. Spurious Point Source Signals in the Galactic Center Excess. PHYSICAL REVIEW LETTERS 2020; 125:121105. [PMID: 33016744 DOI: 10.1103/physrevlett.125.121105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
We reexamine evidence that the Galactic Center Excess (GCE) originates primarily from point sources (PSs). We show that in our region of interest, non-Poissonian template fitting evidence for GCE PSs is an artifact of unmodeled north-south asymmetry of the GCE. This asymmetry is strongly favored by the fit (although it is unclear if this is physical), and when it is allowed, the preference for PSs becomes insignificant. We reproduce this behavior in simulations, including detailed properties of the spurious PS population. We conclude that the non-Poissonian template fitting evidence for GCE PSs is highly susceptible to certain systematic errors and should not at present be taken to robustly disfavor a dominantly smooth GCE.
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Affiliation(s)
- Rebecca K Leane
- Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Tracy R Slatyer
- Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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44
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Leane RK, Slatyer TR. The enigmatic Galactic Center excess: Spurious point sources and signal mismodeling. Int J Clin Exp Med 2020. [DOI: 10.1103/physrevd.102.063019] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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45
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Very Long Baseline Interferometry Observations of the Proposed Radio Counterpart of an EGRET Source. Symmetry (Basel) 2020. [DOI: 10.3390/sym12091516] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We present high-resolution radio interferometric imaging observations of the radio source NVSS J182659+343113 (hereafter J1826+3431), the proposed radio counterpart of the γ-ray source, 3EG J1824+3441 detected by the Energetic Gamma Ray Experiment Telescope (EGRET) on board the Compton Gamma Ray Observatory satellite. We analyzed eight epochs of archival multi-frequency very long baseline interferometry data. We imaged the asymmetric core–jet structure of the source, and detected apparent superluminal motion in the jet. At the highest observing frequency, 15.3 GHz, the core shows high brightness temperature indicating Doppler boosting. Additionally, the radio features undergo substantial flux density variability. These findings strengthen the previous claim of the association of the blazar J1826+3431 with the possible γ-ray source, 3EG J1824+3441.
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46
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Scholtz J, Unwin J. What If Planet 9 Is a Primordial Black Hole? PHYSICAL REVIEW LETTERS 2020; 125:051103. [PMID: 32794880 DOI: 10.1103/physrevlett.125.051103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 02/10/2020] [Accepted: 06/26/2020] [Indexed: 06/11/2023]
Abstract
We highlight that the anomalous orbits of trans-Neptunian objects (TNOs) and an excess in microlensing events in the 5-year Optical Gravitational Lensing Experiment data set can be simultaneously explained by a new population of astrophysical bodies with mass several times that of the Earth (M_{⊕}). We take these objects to be primordial black holes (PBHs) and point out the orbits of TNOs would be altered if one of these PBHs was captured by the Solar System, inline with the Planet 9 hypothesis. Capture of a free floating planet is a leading explanation for the origin of Planet 9, and we show that the probability of capturing a PBH instead is comparable. The observational constraints on a PBH in the outer Solar System significantly differ from the case of a new ninth planet. This scenario could be confirmed through annihilation signals from the dark matter microhalo around the PBH.
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Affiliation(s)
- Jakub Scholtz
- Institute for Particle Physics Phenomenology, Durham University, Durham DH1 3LE, United Kingdom
| | - James Unwin
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, USA and Department of Physics, University of California, Berkeley and Theoretical Physics Group, LBNL and Mathematics Sciences Research Institute, Berkeley, California 94720, USA
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47
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48
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Zhong YM, McDermott SD, Cholis I, Fox PJ. Testing the Sensitivity of the Galactic Center Excess to the Point Source Mask. PHYSICAL REVIEW LETTERS 2020; 124:231103. [PMID: 32603155 DOI: 10.1103/physrevlett.124.231103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 03/02/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
The Fermi Large Area Telescope (Fermi-LAT) Collaboration has an updated point source catalog, referred to as 4FGL. We perform the first template fit using a mask based on this new catalog and find that the excess in gamma rays detected at the Galactic Center in Fermi-LAT data persists. On the other hand, we find that a search for point sources is highly sensitive to the use of the 4FGL catalog: no sizable excess of bright pixels is apparent in the inner Galaxy when we mask out 4FGL point sources. Combining these observations restricts the ability of point sources to contribute to the Galactic Center excess. After identifying which bright sources have no known counterpart, we place strong constraints on any point source luminosity function capable of explaining the smooth emission identified in the template fit.
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Affiliation(s)
- Yi-Ming Zhong
- Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | | | - Ilias Cholis
- Department of Physics, Oakland University, Rochester, Michigan 48326, USA
| | - Patrick J Fox
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
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Manconi S, Korsmeier M, Donato F, Fornengo N, Regis M, Zechlin H. Testing gamma-ray models of blazars in the extragalactic sky. Int J Clin Exp Med 2020. [DOI: 10.1103/physrevd.101.103026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wang ZR, Xi SQ, Liu RY, Xue R, Wang XY. Constraints on the intergalactic magnetic field from
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-ray observations of GRB 190114C. Int J Clin Exp Med 2020. [DOI: 10.1103/physrevd.101.083004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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