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Saturn Auroral Movies from Cassini UVIS
Pryor, W. R.; Stewart, I.; Esposito, L. et al.
2008American Geophysical Union Fall meeting
 

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Keywords :
5704 Atmospheres (0343; 1060); 5706 Aurorae
Abstract :
[en] Cassini's Ultraviolet Imaging Spectrograph (UVIS) has completed four years of study of Saturn's atmosphere and auroras. Two long slit spectral channels are used to obtain EUV data from 56.3-118.2 nm and FUV data from 111.5-191.3 nm. 64 spatial pixels along each slit are combined with slit motion to construct spectral images of Saturn. Auroral emissions are seen from electron-excited molecular and atomic hydrogen. In 2008 UVIS obtained data with the spacecraft well out of Saturn's ring plane, permitting UVIS to obtain a number of short movies of the rotating auroral structures. In some movies a cusp-like feature is present near noon inside the oval. One movie from 2008 day 201 shows parallel linear features on the day side almost at right angles to the main auroral oval that appear, then lengthen, separate in the middle, and then fade away. The same movie also shows one bright "polar flare" inside the oval. A few of the most recent images were obtained at sufficiently close range that 2 spacecraft slews were needed to completely cover the oval. These images provide almost 100 pixels of information across the oval and clearly show multiple arcs of emission on the main oval and scattered emissions inside the oval. We will discuss these features, their locations, and possible interpretations.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Pryor, W. R.;  Central Arizona College, 8470 N Overfield Rd, Coolidge, AZ 85228, United States
Stewart, I.;  LASP/University of Colorado, 1234 Innovation Dr, Boulder, CO 80303, United States
Esposito, L.;  LASP/University of Colorado, 1234 Innovation Dr, Boulder, CO 80303, United States
Jouchoux, A.;  LASP/University of Colorado, 1234 Innovation Dr, Boulder, CO 80303, United States
McClintock, W.;  LASP/University of Colorado, 1234 Innovation Dr, Boulder, CO 80303, United States
Holsclaw, G.;  LASP/University of Colorado, 1234 Innovation Dr, Boulder, CO 80303, United States
Eriksson, S.;  LASP/University of Colorado, 1234 Innovation Dr, Boulder, CO 80303, United States
Ajello, J.;  Jet Propulsion Laboratory, 4800 Oak Grove Dr., Pasadena, CA 91109, United States
West, R.;  Jet Propulsion Laboratory, 4800 Oak Grove Dr., Pasadena, CA 91109, United States
Hansen, C.;  Jet Propulsion Laboratory, 4800 Oak Grove Dr., Pasadena, CA 91109, United States
Shemansky, D.;  Space Environment Technologies, 320 N Halstead St Suite 110, Pasadena, CA 91107, United States
Clarke, J.;  Boston University, 725 Commonwealth Ave., Boston, MA 02215, United States
Nichols, J.;  Boston University, 725 Commonwealth Ave., Boston, MA 02215, United States
Gustin, Jacques ;  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)
Gérard, Jean-Claude  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Colwell, J.;  University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, United States
More authors (7 more) Less
Language :
English
Title :
Saturn Auroral Movies from Cassini UVIS
Publication date :
01 December 2008
Event name :
American Geophysical Union Fall meeting
Event organizer :
AGU
Event place :
San Francisco, United States
Audience :
International
Available on ORBi :
since 22 December 2009

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