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Li G, Hu M, Li W, Yang Y, Wang X, Yan S, Hu L, Zhang J, Mao Y, Riise H, Gao X, Sun T, Liu J, Xiong D, Wang L, Mo J, Iskandar A, Xi G, Xiang D, Wang L, Sun G, Zhang K, Chen J, Lin W, Guo F, Liu Q, Cai G, Zhou W, Zhao J, Chen J, Zheng X, Li K, Zhang M, Xu S, Lyu X, Castro-Tirado AJ, Chufarin V, Potapov N, Ionov I, Korotkiy S, Nazarov S, Sokolovsky K, Hamann N, Herman E. A shock flash breaking out of a dusty red supergiant. Nature 2024; 627:754-758. [PMID: 38093004 DOI: 10.1038/s41586-023-06843-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 11/07/2023] [Indexed: 02/17/2024]
Abstract
Shock-breakout emission is light that arises when a shockwave, generated by the core-collapse explosion of a massive star, passes through its outer envelope. Hitherto, the earliest detection of such a signal was at several hours after the explosion1, although a few others had been reported2-7. The temporal evolution of early light curves should provide insights into the shock propagation, including explosion asymmetry and environment in the vicinity, but this has been hampered by the lack of multiwavelength observations. Here we report the instant multiband observations of a type II supernova (SN 2023ixf) in the galaxy M101 (at a distance of 6.85 ± 0.15 Mpc; ref. 8), beginning at about 1.4 h after the explosion. The exploding star was a red supergiant with a radius of about 440 solar radii. The light curves evolved rapidly, on timescales of 1-2 h, and appeared unusually fainter and redder than predicted by the models9-11 within the first few hours, which we attribute to an optically thick dust shell before it was disrupted by the shockwave. We infer that the breakout and perhaps the distribution of the surrounding dust were not spherically symmetric.
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Affiliation(s)
- Gaici Li
- Physics Department, Tsinghua University, Beijing, China
| | - Maokai Hu
- Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - Wenxiong Li
- The School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel
- Key Laboratory of Optical Astronomy, National Astronomical Observatories of China, Chinese Academy of Sciences, Beijing, China
| | - Yi Yang
- Department of Astronomy, University of California, Berkeley, CA, USA
| | - Xiaofeng Wang
- Physics Department, Tsinghua University, Beijing, China.
- Beijing Planetarium, Beijing Academy of Science and Technology, Beijing, China.
| | - Shengyu Yan
- Physics Department, Tsinghua University, Beijing, China
| | - Lei Hu
- Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
- McWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Jujia Zhang
- Yunnan Observatories, Chinese Academy of Sciences, Kunming, China
- Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, China
- International Centre of Supernovae, Yunnan Key Laboratory, Kunming, China
| | - Yiming Mao
- National Astronomical Observatories of China, Chinese Academy of Sciences, Beijing, China
| | | | - Xing Gao
- Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, China
| | - Tianrui Sun
- Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - Jialian Liu
- Physics Department, Tsinghua University, Beijing, China
| | - Dingrong Xiong
- Yunnan Observatories, Chinese Academy of Sciences, Kunming, China
- Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, China
| | - Lifan Wang
- Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, TX, USA
| | - Jun Mo
- Physics Department, Tsinghua University, Beijing, China
| | - Abdusamatjan Iskandar
- Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, China
- School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, China
| | - Gaobo Xi
- Physics Department, Tsinghua University, Beijing, China
| | - Danfeng Xiang
- Physics Department, Tsinghua University, Beijing, China
| | - Lingzhi Wang
- Key Laboratory of Optical Astronomy, National Astronomical Observatories of China, Chinese Academy of Sciences, Beijing, China
- South America Center for Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
| | | | - Keming Zhang
- Department of Astronomy, University of California, Berkeley, CA, USA
| | - Jian Chen
- Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
| | - Weili Lin
- Physics Department, Tsinghua University, Beijing, China
| | - Fangzhou Guo
- Physics Department, Tsinghua University, Beijing, China
| | - Qichun Liu
- Physics Department, Tsinghua University, Beijing, China
| | | | | | | | - Jin Chen
- Xingming Observatory, Urumqi, China
| | | | | | - Mi Zhang
- Xingming Observatory, Urumqi, China
| | | | | | - Alberto J Castro-Tirado
- Instituto de Astrofisica de Andalucia (IAA-CSIC), Granada, Spain
- Unidad Asociada al CSIC, Departamento de Ingenieria de Sistemas y Automatica, Escuela de Ingenierias, Universidad de Malaga, Malaga, Spain
| | - Vasilii Chufarin
- G. M. Grechko Nizhny Novgorod Planetarium, Nizhny Novgorod, Russia
- Minin University, Nizhny Novgorod, Russia
| | | | | | | | | | - Kirill Sokolovsky
- Department of Astronomy, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Sternberg Astronomical Institute, Moscow State University, Moscow, Russia
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Hye N, Klein-Jöbstl D, Blessing A, Burmeister J, Hamann N, Aurich C, Drillich M. Effect of two postpartum intramuscular treatments with β-carotene (Carofertin®) on the blood concentration of β-carotene and on the reproductive performance parameters of dairy cows. Theriogenology 2020; 148:1-7. [PMID: 32126391 DOI: 10.1016/j.theriogenology.2020.02.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 01/26/2020] [Accepted: 02/25/2020] [Indexed: 10/24/2022]
Abstract
The aim of the study was to determine whether two postpartum intramuscular treatments with 200 mg of beta-(β-)carotene (Carofertin; Alvetra u. Werfft, Vienna, Austria) in a 14-day interval increases β-carotene concentrations in blood, particularly around the time of the first artificial insemination (AI), and to test the effect of the treatment on fertility parameters, luteal size, and progesterone blood levels of dairy cows. A total of 297 Holstein dairy cows were enrolled in the study. Between 28 and 34 days postpartum (dpp) β-carotene concentrations were measured in blood samples using an on-site test (iCheck carotene; BioAnalyt, Teltow, Germany). Cows with a β-carotene concentration <3.5 mg/L, indicating a deficiency of β-carotene, were allocated either to the β-carotene treatment group BCT (n = 123) or to the control group CON (n = 121). Cows with concentrations ≥3.5 mg/L were assigned to an optimally supplied reference group (REF; n = 53). Cows in the BCT group received 200 mg of β-carotene intramuscularly at 28-34 dpp and at 42-48 dpp. Further blood samples were collected at 35-41 dpp, 42-48 dpp, 49-55 dpp, and in the week after the first AI and their β-carotene concentrations were analyzed. Between day 10 and 14 after the first AI, the blood progesterone concentration was measured and the size of the corpus luteum (CL) was determined by ultrasound. Blood β-carotene concentrations increased in the BCT cows in the week after the treatment with a peak at 49-55 dpp and were significantly higher than in the CON group at each time point after the first treatment. Logistic regression models, however, revealed that the treatment with β-carotene had no effect on first service conception rate, days to first service, time to pregnancy, or percentage of pregnant cows within 150 dpp. Furthermore, there was no effect on progesterone concentration or the size of the CL between the groups. In conclusion, two treatments with Carofertin postpartum increased β-carotene blood concentrations but had no effect on the fertility parameters in this study.
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Affiliation(s)
- N Hye
- University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, Department for Farm Animals and Veterinary Public Health, Vetmeduni Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - D Klein-Jöbstl
- University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, Department for Farm Animals and Veterinary Public Health, Vetmeduni Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - A Blessing
- University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, Department for Farm Animals and Veterinary Public Health, Vetmeduni Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - J Burmeister
- University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, Department for Farm Animals and Veterinary Public Health, Vetmeduni Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - N Hamann
- University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, Department for Farm Animals and Veterinary Public Health, Vetmeduni Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - C Aurich
- Artificial Insemination and Embryo Transfer, Department for Small Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - M Drillich
- University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, Department for Farm Animals and Veterinary Public Health, Vetmeduni Vienna, Veterinärplatz 1, 1210, Vienna, Austria.
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Hamann N, Zaucke F, Heilig J, Oberländer KD, Brüggemann GP, Niehoff A. Effect of different running modes on the morphological, biochemical, and mechanical properties of articular cartilage. Scand J Med Sci Sports 2012; 24:179-88. [PMID: 22889098 DOI: 10.1111/j.1600-0838.2012.01513.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2012] [Indexed: 11/28/2022]
Abstract
Mechanical loading plays an important role not solely in cartilage development, but also in cartilage degeneration. Its adaptation behavior to mechanical loading has not been clearly delineated. The aim of the study was to examine the effect of different running modes (with different muscle contraction types) on morphological, biochemical, and mechanical properties of articular cartilage in the knee of growing rats. Thirty-six female Sprague-Dawley rats were randomly assigned into a nonactive age-matched control (AMC), level (LEVEL), and 20° downhill (DOWN) running group (n = 12 each). Running groups were trained on a treadmill for 30 min/day, 5 days/week for 6 weeks. Immunohistochemical staining and analysis of expression for collagen II, collagen IX, cartilage oligomeric matrix protein (COMP), and matrilin-3, histomorphometry of femoral cartilage height and femoral COMP staining height, and indentation testing of tibial articular cartilage were performed. Rats subjected to downhill running showed a significantly (P = 0.015) higher COMP staining height and a tendentially (P = 0.084) higher cartilage height in the high-weight bearing area of femoral articular cartilage. Cartilage thickness, mechanical properties, and expression of cartilage network proteins in tibial cartilage remained unaffected by different running modes. Our data suggest that joint loading induced by eccentric muscle contractions during downhill running may lead to a site-specific adaptation.
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Affiliation(s)
- N Hamann
- Institute of Biomechanics and Orthopaedics, German Sport University Cologne, Cologne, Germany
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Barnes PD, Franklin G, Quinn B, Schumacher RA, Zeps V, Hamann N, Dutty W, Fischer H, Franz J, Rössle E, Schmitt H, Todenhagen R, Frankenberg RV, Kilian K, Oelert W, Röhrich K, Sachs K, Sefzick T, Ziolkowski M, Eisenstein RA, Harris PG, Hertzog DW, Hughes SA, Reimer PE, Tayloe RL, Eyrich W, Geyer R, Kirsch M, Kraft RA, Stinzing F, Johansson T, Ohlsson S. Measurement of the p-barp--> Lambda -bar Lambda and p-barp--> Sigma -bar 0 Lambda +c.c. reactions at 1.726 and 1.771 GeV/c. Phys Rev C Nucl Phys 1996; 54:2831-2842. [PMID: 9971655 DOI: 10.1103/physrevc.54.2831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Barnes PD, Diebold G, Franklin G, Quinn B, Schumacher R, Seydoux J, Zeps V, Birien P, Dutty W, Fischer H, Franz J, Rössle E, Schledermann H, Schmitt H, Todenhagen R, Breunlich W, Nägele N, Bröders R, Frankenberg R, Kilian K, Oelert W, Röhrich K, Sachs K, Sefzick T, Sehl G, Ziolkowski M, Eisenstein RA, Hertzog D, Tayloe R, Dennert H, Eyrich W, Geyer R, Hauffe J, Hofmann A, Kirsch M, Kraft RA, Stinzing F, Hamann N, Johansson T, Ohlsson S. Observables in high-statistics measurements of the reaction p-barp--> Lambda -bar Lambda. Phys Rev C Nucl Phys 1996; 54:1877-1886. [PMID: 9971536 DOI: 10.1103/physrevc.54.1877] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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