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HST STIS Observations of Saturn's Auroral Variations Concurrent with the Cassini Solar Wind Campaign in Jan. 2004
Clarke, J. T.; Gérard, Jean-Claude; Grodent, Denis et al.
2004American Geophysical Union Spring Meeting 2004
 

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Keywords :
5719 Interactions with particles and fields; 5737 Magnetospheres (2756); 5757 Remote sensing; 6275 Saturn
Abstract :
[en] Saturn's magnetosphere is often referred to as "intermediate between the cases of the Earth and Jupiter". Due to very limited measurements of Saturn's magnetosphere and auroral activity, however, it has never been clear in detail what this statement means. A recent campaign of HST STIS UV imaging of Saturn's aurora has been carried out over 8-30 Jan. 2004 concurrent with measurements of the approaching solar wind by Cassini. This imaging set is much more comprehensive than any earlier observations of Saturn's aurora, obtained at a time when Saturn's southern auroral oval is completely visible due to the large apparent tilt of Saturn. The data provide the opportunity to determine the mean distribution of the auroral emissions, the degree of corotation of any bright regions, any variations with local time of the emissions, the latitudinal motions of the main oval with time and location, and other parameters. In addition, each of these can be compared with the approaching solar wind conditions and Saturn's kilometric radiation (SKR) intensity from Cassini measurements. Quick looks at the data from HST and Cassini demonstrate that the measurements have been made successfully, and the coverage includes dramatic variations in Saturn's auroral activity as well as at least two solar wind shocks passing Cassini. This presentation will concentrate on the measured properties of Saturn's aurora in the context of comparisons with the magnetospheres of the Earth and Jupiter.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Clarke, J. T.;  Boston University, 725 Commoonweealth Ave, Boston, MA 02215 United States
Gérard, Jean-Claude  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Grodent, Denis  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Ajello, J.;  Jet Propulsion Lab., Pasadena,
Ballester, G.;  Univ. of Arizona, Tucson,
Ben Jaffel, L.;  Institut d'Astrophysiques, CNRS, Paris,
Bolton, S.;  Jet Propulsion Lab., Pasadena,
Bunce, E.;  Univ. of Leicester, UK,
Connerney, J.;  NASA Goddard Space Flight Center, Greenbelt,
Cowley, Stanley W.H.;  Univ. of Leicester, UK,
Crary, F.;  Southwest Research Institute, San Antonio,
Dougherty, M.;  Imperial College, London UK,
Gladstone, R.;  Southwest Research Institute, San Antonio,
Gombosi, T.;  Univ. of Michigan, Ann Arbor, M United States
Gurnett, D.;  Univ. of Iowa, Iowa City,
Gustin, Jacques ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Hill, T.;  Rice Univ., Houston,
Kivelson, M.;  UCLA, Los Angeles,
Krimigis, T.;  Applied Physics Lab., Johns Hopkins,
Kurth, B.;  Univ. of Iowa, Iowa City,
Mauk, B.;  Applied Physics Lab., Johns Hopkins,
Prange, R.;  Observatoire de Meudon, France,
Pryor, W.;  Central Arizona Univ., Arizona,
Richardson, J.;  MAT, Cambridge,
Trauger, J.;  Jet Propulsion Lab., Pasadena,
Waite, H.;  Univ. of Michigan, Ann Arbor, M United States
Young, D.;  Southwest Research Institute, San Antonio,
Zarka, P.;  Observatoire de Paris, Meudon,
More authors (18 more) Less
Language :
English
Title :
HST STIS Observations of Saturn's Auroral Variations Concurrent with the Cassini Solar Wind Campaign in Jan. 2004
Publication date :
17 May 2004
Event name :
American Geophysical Union Spring Meeting 2004
Event organizer :
American Geophysical Union
Event place :
Montreal, Canada
Event date :
17-21 May, 2004
By request :
Yes
Audience :
International
Available on ORBi :
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