Reference : Jupiter's polar auroral emissions
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Jupiter's polar auroral emissions
Grodent, Denis mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
Clarke, J. T. [> > > >]
Waite, J. H. [> > > >]
Cowley, S. W. H. [> > > >]
Gérard, Jean-Claude mailto [Université de Liège - ULiège > Département d'astrophys.]
Kim, J. [> > > >]
Journal of Geophysical Research. Space Physics
Amer Geophysical Union
Yes (verified by ORBi)
[en] Jupiter ; aurora ; reconnection ; planetary magnetospheres ; solar wind/magnetosphere interactions
[en] [1] This paper reports a study of Jupiter's polar auroral emissions observed in an extended series of FUV images. They were obtained on seven days, during winter 2000-2001, with the STIS camera on board the Hubble Space Telescope. The fixed pointing yielded highly accurate and consistent tracking of emisson features as Jupiter rotated, allowing the analysis of the auroral morphology and brightness on timescales ranging from seconds to days. In the Northern Hemisphere, the polar emissions, located poleward of the main oval, usually represent about 30% of the total auroral FUV emitted power. They show emission bursts lasting similar to100 s, while the main oval remains stable. The polar region may be divided into three regions apparently fixed in magnetic local time: the dawnside dark region, the poleward swirl region, and the duskside active region in which flares and arc-like features are observed. Each of these UV emission regions can be identified with its infrared counterpart and probably relates to a different sector of the Dungey cycle or Vasyliunas cycle plasma flows.
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