Reference : Observations of Jovian polar auroral filaments
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/27350
Observations of Jovian polar auroral filaments
English
Nichols, J. D. [Boston University, Boston, Massachusetts, USA > Center for Space Physics]
Clarke, J. T. [Boston University, Boston, Massachusetts, USA > Center for Space Physics]
Gérard, Jean-Claude mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
Grodent, Denis mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
1-Apr-2009
Geophysical Research Letters
American Geophysical Union
36
08101
Yes (verified by ORBi)
International
0094-8276
Washington
DC
[en] Planetary Sciences: Fluid Planets: Aurorae ; Planetary Sciences: Fluid Planets: Magnetospheres (2756) ; Planetary Sciences: Solar System Objects: Jupiter ; Magnetospheric Physics: Auroral phenomena (2407) ; Magnetospheric Physics: Planetary magnetospheres (5443 ; 5737 ; 6033)
[en] In this paper we report a phenomenon hitherto unobserved in Jupiter's ultraviolet polar auroras, specifically thin (~0.6° wide), long-lived quasi-sun-aligned polar auroral filaments (PAFs) of brightness ~100 kR spanning the highly variable region poleward of the main oval. This observation, made using Hubble Space Telescope images, is significant since no coherent structures have previously been observed in Jupiter's very high latitude auroral region, and it may help shed light on the dynamics of Jupiter's under-explored magnetotail. PAFs have been observed in 4 sets of observations over 6 days in 2007, and their occurrence appears to be independent of impinging solar wind conditions. The feature comprises two components: the section toward noon remains fixed in orientation toward the sun, while the anti-sunward section rotates. We estimate overall rotation rates of ~0--45% of corotation, values which may indicate the rotation rate of Jupiter's polar ionosphere and tail lobes.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/27350
also: http://hdl.handle.net/2268/29013
10.1029/2009GL037578
http://adsabs.harvard.edu/abs/2009GeoRL..3608101N

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