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Stallard TS, Baines KH, Melin H, Bradley TJ, Moore L, O'Donoghue J, Miller S, Chowdhury MN, Badman SV, Allison HJ, Roussos E. Local-time averaged maps of H 3+ emission, temperature and ion winds. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2019; 377:20180405. [PMID: 31378177 PMCID: PMC6710899 DOI: 10.1098/rsta.2018.0405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/19/2019] [Indexed: 05/20/2023]
Abstract
We present Keck-NIRSPEC observations of Saturn's [Formula: see text] aurora taken over a period of a month, in support of the Cassini mission's 'Grand Finale'. These observations produce two-dimensional maps of Saturn's [Formula: see text] temperature and ion winds for the first time. These maps show surprising complexity, with different morphologies seen in each night. The [Formula: see text] ion winds reveal multiple arcs of 0.5-1 km s-1 ion flows inside the main auroral emission. Although these arcs of flow occur in different locations each night, they show intricate structures, including mirrored flows on the dawn and dusk of the planet. These flows do not match with the predicted flows from models of either axisymmetric currents driven by the Solar Wind or outer magnetosphere, or the planetary periodic currents associated with Saturn's variable rotation rate. The average of the ion wind flows across all the nights reveals a single narrow and focused approximately 0.3 km s-1 flow on the dawn side and broader and more extensive 1-2 km s-1 sub-corotation, spilt into multiple arcs, on the dusk side. The temperature maps reveal sharp gradients in ionospheric temperatures, varying between 300 and 600 K across the auroral region. These temperature changes are localized, resulting in hot and cold spots across the auroral region. These appear to be somewhat stable over several nights, but change significantly over longer periods. The position of these temperature extremes is not well organized by the planetary period and there is no evidence for a thermospheric driver of the planetary period current system. Since no past magnetospheric or thermospheric models explain the rich complexity observed here, these measurements represent a fantastic new resource, revealing the complexity of the interaction between Saturn's thermosphere, ionosphere and magnetosphere. This article is part of a discussion meeting issue 'Advances in hydrogen molecular ions: H3+, H5+ and beyond'.
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Affiliation(s)
- Tom S. Stallard
- Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
- e-mail:
| | - Kevin H. Baines
- Atmospheric Oceanic and Space Science University of Wisconsin-Madison, 1225 W Dayton St, Madison, WI 53706, USA
| | - Henrik Melin
- Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
| | - Thomas J. Bradley
- Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
| | - Luke Moore
- Center for Space Physics, Boston University, 725 Commonwealth Avenue, Room 506, Boston, MA 02215, USA
| | - James O'Donoghue
- Institute of Space and Astronautical Science, JAXA, Yoshinodai 3-1-1, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
| | - Steve Miller
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
| | - Mohammad N. Chowdhury
- Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
| | - Sarah V. Badman
- Department of Physics, Lancaster University, Bailrigg, Lancaster LA1 4YW, UK
| | | | - Elias Roussos
- Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077, Goettingen, Germany
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Pilkington NM, Achilleos N, Arridge CS, Guio P, Masters A, Ray LC, Sergis N, Thomsen MF, Coates AJ, Dougherty MK. Internally driven large-scale changes in the size of Saturn's magnetosphere. JOURNAL OF GEOPHYSICAL RESEARCH. SPACE PHYSICS 2015; 120:7289-7306. [PMID: 27867793 PMCID: PMC5111417 DOI: 10.1002/2015ja021290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 07/22/2015] [Accepted: 07/26/2015] [Indexed: 05/20/2023]
Abstract
Saturn's magnetic field acts as an obstacle to solar wind flow, deflecting plasma around the planet and forming a cavity known as the magnetosphere. The magnetopause defines the boundary between the planetary and solar dominated regimes, and so is strongly influenced by the variable nature of pressure sources both outside and within. Following from Pilkington et al. (2014), crossings of the magnetopause are identified using 7 years of magnetic field and particle data from the Cassini spacecraft and providing unprecedented spatial coverage of the magnetopause boundary. These observations reveal a dynamical interaction where, in addition to the external influence of the solar wind dynamic pressure, internal drivers, and hot plasma dynamics in particular can take almost complete control of the system's dayside shape and size, essentially defying the solar wind conditions. The magnetopause can move by up to 10-15 planetary radii at constant solar wind dynamic pressure, corresponding to relatively "plasma-loaded" or "plasma-depleted" states, defined in terms of the internal suprathermal plasma pressure.
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Affiliation(s)
- N. M. Pilkington
- Atmospheric Physics Laboratory, Department of Physics and AstronomyUniversity College LondonLondonUK
- The Centre for Planetary SciencesUCL/BirkbeckLondonUK
| | - N. Achilleos
- Atmospheric Physics Laboratory, Department of Physics and AstronomyUniversity College LondonLondonUK
- The Centre for Planetary SciencesUCL/BirkbeckLondonUK
| | | | - P. Guio
- Atmospheric Physics Laboratory, Department of Physics and AstronomyUniversity College LondonLondonUK
- The Centre for Planetary SciencesUCL/BirkbeckLondonUK
| | - A. Masters
- Blackett LaboratoryImperial College LondonLondonUK
| | - L. C. Ray
- Atmospheric Physics Laboratory, Department of Physics and AstronomyUniversity College LondonLondonUK
- The Centre for Planetary SciencesUCL/BirkbeckLondonUK
| | - N. Sergis
- Academy of AthensOffice of Space Research and TechnologyAthensGreece
| | | | - A. J. Coates
- The Centre for Planetary SciencesUCL/BirkbeckLondonUK
- Mullard Space Science Laboratory, Department of Space and Climate PhysicsUniversity College LondonDorkingUK
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3
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Jia X, Kivelson MG. Driving Saturn's magnetospheric periodicities from the upper atmosphere/ionosphere: Magnetotail response to dual sources. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2012ja018183] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Badman SV, Andrews DJ, Cowley SWH, Lamy L, Provan G, Tao C, Kasahara S, Kimura T, Fujimoto M, Melin H, Stallard T, Brown RH, Baines KH. Rotational modulation and local time dependence of Saturn's infrared H3+auroral intensity. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2012ja017990] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Szego K, Nemeth Z, Erdos G, Foldy L, Bebesi Z, Thomsen M, Delapp D. Location of the magnetodisk in the nightside outer magnetosphere of Saturn near equinox based on ion densities. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2012ja017817] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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6
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Jia X, Hansen KC, Gombosi TI, Kivelson MG, Tóth G, DeZeeuw DL, Ridley AJ. Magnetospheric configuration and dynamics of Saturn's magnetosphere: A global MHD simulation. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2012ja017575] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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7
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Andrews DJ, Cowley SWH, Dougherty MK, Lamy L, Provan G, Southwood DJ. Planetary period oscillations in Saturn's magnetosphere: Evolution of magnetic oscillation properties from southern summer to post-equinox. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011ja017444] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Jia X, Kivelson MG, Gombosi TI. Driving Saturn's magnetospheric periodicities from the upper atmosphere/ionosphere. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011ja017367] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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9
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Provan G, Andrews DJ, Arridge CS, Coates AJ, Cowley SWH, Cox G, Dougherty MK, Jackman CM. Dual periodicities in planetary-period magnetic field oscillations in Saturn's tail. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011ja017104] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Arridge CS, André N, Khurana KK, Russell CT, Cowley SWH, Provan G, Andrews DJ, Jackman CM, Coates AJ, Sittler EC, Dougherty MK, Young DT. Periodic motion of Saturn's nightside plasma sheet. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2011ja016827] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- C. S. Arridge
- Mullard Space Science Laboratory; University College London; Dorking UK
- Centre for Planetary Sciences at UCL/Birkbeck; London UK
| | - N. André
- Institut de Recherche en Astrophysique et Planétologie; CNRS; Toulouse France
- Institut de Recherche en Astrophysique et Planétologie; Université de Toulouse, UPS-OMP; Toulouse France
| | - K. K. Khurana
- Institute for Geophysics and Planetary Physics; University of California; Los Angeles California USA
| | - C. T. Russell
- Institute for Geophysics and Planetary Physics; University of California; Los Angeles California USA
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - G. Provan
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - D. J. Andrews
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - C. M. Jackman
- Centre for Planetary Sciences at UCL/Birkbeck; London UK
- Blackett Laboratory; Imperial College London; London UK
- Department of Physics and Astronomy; University College London; London UK
| | - A. J. Coates
- Mullard Space Science Laboratory; University College London; Dorking UK
- Centre for Planetary Sciences at UCL/Birkbeck; London UK
| | - E. C. Sittler
- NASA Goddard Space Flight Center; Greenbelt Maryland USA
| | | | - D. T. Young
- Southwest Research Institute; San Antonio Texas USA
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Andrews DJ, Cecconi B, Cowley SWH, Dougherty MK, Lamy L, Provan G, Zarka P. Planetary period oscillations in Saturn's magnetosphere: Evidence in magnetic field phase data for rotational modulation of Saturn kilometric radiation emissions. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2011ja016636] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- D. J. Andrews
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - B. Cecconi
- LESIA, Observatoire de Paris, CNRS, UPMC; Université Paris VII - Denis Diderot; Meudon France
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | | | - L. Lamy
- LESIA, Observatoire de Paris, CNRS, UPMC; Université Paris VII - Denis Diderot; Meudon France
| | - G. Provan
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - P. Zarka
- LESIA, Observatoire de Paris, CNRS, UPMC; Université Paris VII - Denis Diderot; Meudon France
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12
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Kellett S, Arridge CS, Bunce EJ, Coates AJ, Cowley SWH, Dougherty MK, Persoon AM, Sergis N, Wilson RJ. Saturn's ring current: Local time dependence and temporal variability. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010ja016216] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- S. Kellett
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - C. S. Arridge
- Mullard Space Science Laboratory; University College London; Dorking UK
| | - E. J. Bunce
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - A. J. Coates
- Mullard Space Science Laboratory; University College London; Dorking UK
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - M. K. Dougherty
- Space and Atmospheric Physics Group; Imperial College London; London UK
| | - A. M. Persoon
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - N. Sergis
- Office for Space Research and Technology; Academy of Athens; Athens Greece
| | - R. J. Wilson
- Laboratory for Atmospheric and Space Physics; University of Colorado at Boulder; Boulder Colorado USA
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13
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Provan G, Andrews DJ, Cecconi B, Cowley SWH, Dougherty MK, Lamy L, Zarka PM. Magnetospheric period magnetic field oscillations at Saturn: Equatorial phase “jitter” produced by superposition of southern and northern period oscillations. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010ja016213] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- G. Provan
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - D. J. Andrews
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - B. Cecconi
- LESIA, Observatoire de Paris, CNRS, UPMC; Université Paris Diderot; Meudon France
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | | | - L. Lamy
- LESIA, Observatoire de Paris, CNRS, UPMC; Université Paris Diderot; Meudon France
| | - P. M. Zarka
- LESIA, Observatoire de Paris, CNRS, UPMC; Université Paris Diderot; Meudon France
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14
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Talboys DL, Bunce EJ, Cowley SWH, Arridge CS, Coates AJ, Dougherty MK. Statistical characteristics of field-aligned currents in Saturn's nightside magnetosphere. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010ja016102] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- D. L. Talboys
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - E. J. Bunce
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - C. S. Arridge
- Mullard Space Science Laboratory; University College London; London UK
- Centre for Planetary Sciences at UCL/Birkbeck; London UK
| | - A. J. Coates
- Mullard Space Science Laboratory; University College London; London UK
- Centre for Planetary Sciences at UCL/Birkbeck; London UK
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15
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Southwood D. Direct evidence of differences in magnetic rotation rate between Saturn's northern and southern polar regions. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010ja016070] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- David Southwood
- European Space Agency; Paris France
- Blackett Laboratory; Imperial College; London UK
- Institute of Geophysics and Planetary Physics; University of California; Los Angeles California USA
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16
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Ye SY, Gurnett DA, Groene JB, Wang Z, Kurth WS. Dual periodicities in the rotational modulation of Saturn narrowband emissions. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2010ja015780] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- S.-Y. Ye
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - D. A. Gurnett
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - J. B. Groene
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - Z. Wang
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - W. S. Kurth
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
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17
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Andrews DJ, Coates AJ, Cowley SWH, Dougherty MK, Lamy L, Provan G, Zarka P. Magnetospheric period oscillations at Saturn: Comparison of equatorial and high-latitude magnetic field periods with north and south Saturn kilometric radiation periods. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2010ja015666] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- D. J. Andrews
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - A. J. Coates
- Mullard Space Science Laboratory; University College London; Dorking UK
- Centre for Planetary Sciences; University College London/Birkbeck; London UK
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | | | - L. Lamy
- Blackett Laboratory; Imperial College London; London UK
- LESIA, Observatoire de Paris, CNRS, UPMC; Université Paris Diderot; Meudon France
| | - G. Provan
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - P. Zarka
- LESIA, Observatoire de Paris, CNRS, UPMC; Université Paris Diderot; Meudon France
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18
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Clarke KE, Andrews DJ, Arridge CS, Coates AJ, Cowley SWH. Magnetopause oscillations near the planetary period at Saturn: Occurrence, phase, and amplitude. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009ja014745] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- K. E. Clarke
- Department of Physics and Astronomy; University of Leicester; Leicester United Kingdom
| | - D. J. Andrews
- Department of Physics and Astronomy; University of Leicester; Leicester United Kingdom
| | - C. S. Arridge
- Mullard Space Science Laboratory; University College London; Dorking United Kingdom
- The Centre for Planetary Sciences at University College London/Birkbeck; London United Kingdom
| | - A. J. Coates
- Mullard Space Science Laboratory; University College London; Dorking United Kingdom
- The Centre for Planetary Sciences at University College London/Birkbeck; London United Kingdom
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester United Kingdom
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19
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Clarke KE, Andrews DJ, Coates AJ, Cowley SWH, Masters A. Magnetospheric period oscillations of Saturn's bow shock. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009ja015164] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- K. E. Clarke
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - D. J. Andrews
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - A. J. Coates
- Mullard Space Science Laboratory; University College London; Dorking UK
- Centre for Planetary Sciences at UCL/Birkbeck; London UK
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - A. Masters
- Mullard Space Science Laboratory; University College London; Dorking UK
- Centre for Planetary Sciences at UCL/Birkbeck; London UK
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20
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Andrews DJ, Cowley SWH, Dougherty MK, Provan G. Magnetic field oscillations near the planetary period in Saturn's equatorial magnetosphere: Variation of amplitude and phase with radial distance and local time. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009ja014729] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | - G. Provan
- University of Leicester; Leicester UK
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21
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Carbary JF, Mitchell DG, Krimigis SM, Gurnett DA, Kurth WS. Phase relations between energetic neutral atom intensities and kilometric radio emissions at Saturn. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009ja014519] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- J. F. Carbary
- Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - D. G. Mitchell
- Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - S. M. Krimigis
- Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - D. A. Gurnett
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
| | - W. S. Kurth
- Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
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22
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Affiliation(s)
- David J. Southwood
- European Space Agency Headquarters; Paris France
- Physics Department; Imperial College; London UK
- Institute of Geophysics and Planetary Physics; University of California; Los Angeles California USA
| | - Margaret G. Kivelson
- Institute of Geophysics and Planetary Physics; University of California; Los Angeles California USA
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23
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Talboys DL, Arridge CS, Bunce EJ, Coates AJ, Cowley SWH, Dougherty MK. Characterization of auroral current systems in Saturn's magnetosphere: High-latitude Cassini observations. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008ja013846] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- D. L. Talboys
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - C. S. Arridge
- Mullard Space Science Laboratory; University College London; Dorking UK
- Centre for Planetary Sciences; University College London; London UK
| | - E. J. Bunce
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - A. J. Coates
- Mullard Space Science Laboratory; University College London; Dorking UK
- Centre for Planetary Sciences; University College London; London UK
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester UK
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24
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Provan G, Cowley SWH, Nichols JD. Phase relation of oscillations near the planetary period of Saturn's auroral oval and the equatorial magnetospheric magnetic field. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008ja013988] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- G. Provan
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - J. D. Nichols
- Department of Physics and Astronomy; University of Leicester; Leicester UK
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25
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Provan G, Andrews DJ, Arridge CS, Coates AJ, Cowley SWH, Milan SE, Dougherty MK, Wright DM. Polarization and phase of planetary-period magnetic field oscillations on high-latitude field lines in Saturn's magnetosphere. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008ja013782] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- G. Provan
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - D. J. Andrews
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - C. S. Arridge
- Mullard Space Science Laboratory; University College London; Dorking UK
- Centre for Planetary Sciences; University College London; London UK
| | - A. J. Coates
- Mullard Space Science Laboratory; University College London; Dorking UK
| | - S. W. H. Cowley
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | - S. E. Milan
- Department of Physics and Astronomy; University of Leicester; Leicester UK
| | | | - D. M. Wright
- Department of Physics and Astronomy; University of Leicester; Leicester UK
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