Article (Scientific journals)
The multiple spots of the Ganymede auroral footprint
Bonfond, Bertrand; Hess, Sébastien; Bagenal, Fran et al.
2013In Geophysical Research Letters, 40
Peer Reviewed verified by ORBi
 

Files


Full Text
grl50989.pdf
Publisher postprint (556.78 kB)
Download
Annexes
2013GL057783_readme.txt
Publisher postprint (4.24 kB)
Download
2011GL050253_ms01.gif
Publisher postprint (1.15 MB)
Download
2013GL057783_ms02.gif
Publisher postprint (1.17 MB)
Download
2013GL057783_ms03.gif
Publisher postprint (2.76 MB)
Download
2013GL057783_ms04.gif
Publisher postprint (898.72 kB)
Download
2013GL057783_ms05.gif
Publisher postprint (3.18 MB)
Download
2013GL057783_ms06.gif
Publisher postprint (3.78 MB)
Download
2013GL057783_ms07.gif
Publisher postprint (3.53 MB)
Download
2013GL057783_ms08.gif
Publisher postprint (3.51 MB)
Download
2013GL057783_ms09.eps
Publisher postprint (45.78 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Jupiter; Ganymede; footprint; aurora; LISRI
Abstract :
[en] The interaction between the moons and the magnetosphere of giant planets sometimes gives rise to auroral signatures in the planetary ionosphere, called the satellite footprints. So far, footprints have been detected for Io, Europa, Ganymede, and Enceladus. These footprints are usually seen as single spots. However, the Io footprint, the brightest one, displays a much more complex morphology made of at least three different spots and an extended tail. Here we present Hubble Space Telescope FUV images showing evidence for a second spot in the Ganymede footprint. The spots separation distance changes as Ganymede moves latitudinally in the plasma sheet, as is seen for the Io footprint. This indicates that the processes identified at Io are universal. Moreover, for similar Ganymede System III longitudes, the distance may also vary significantly with time, indicating changes in the plasma sheet density. We identified a rapid evolution of this distance 8 days after the detection of a volcanic outburst at Io, suggesting that such auroral observations could be used to estimate the plasma density variations at Ganymede.
Research center :
LiSRI - Liège Space Research Institute - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Bonfond, Bertrand  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Hess, Sébastien;  Université de Versailles Saint-Quentin > LATMOS
Bagenal, Fran;  University of Colorado at Boulder - CU > LASP
Gérard, Jean-Claude  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Grodent, Denis  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des atmosphères et des environnements planétaires
Radioti, Aikaterini ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Gustin, Jacques ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des atmosphères et des environnements planétaires
Clarke, John T.;  Boston University > Center for Space Physics
Language :
English
Title :
The multiple spots of the Ganymede auroral footprint
Publication date :
04 October 2013
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
American Geophysical Union, Washington, United States - District of Columbia
Volume :
40
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
Available on ORBi :
since 01 October 2013

Statistics


Number of views
102 (19 by ULiège)
Number of downloads
153 (3 by ULiège)

Scopus citations®
 
27
Scopus citations®
without self-citations
10
OpenCitations
 
26

Bibliography


Similar publications



Contact ORBi