Reference : When Moons Create Aurora: The Satellite Footprints on Giant Planets
Parts of books : Contribution to collective works
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/136072
When Moons Create Aurora: The Satellite Footprints on Giant Planets
English
Bonfond, Bertrand mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
2012
Auroral Phenomenology and Magnetospheric Processes: Earth and Other Planets
Keiling, Andreas
Donovan, Eric
Bagenal, Fran
Karlsson, Thomas
AGU
Geophysical Monograph Series; Vol. 197
133-140
Yes
978-0-87590-487-0
Washington
DC
[en] Jupiter ; Saturn ; footprint ; aurora ; Io ; Europa ; Ganymede ; Enceladus
[en] Satellite footprints are localized auroral emissions in the upper atmosphere of Jupiter (Saturn) near the magnetic field lines linking to satellites, Io, Europa, and Ganymede (Enceladus). They are the auroral signatures of the strong electromagnetic interactions taking place between these moons and the intensely magnetized, rapidly rotating planets they orbit. The Io and Europa spots have been shown to be followed by an extended tail. This might also be the case for the Ganymede and Enceladus emissions, although not yet unambiguously observed. Moreover, the main Io spot is accompanied by secondary spots attributed either to reflections of the plasma waves generated at Io on the Io plasma torus boundary or to electrons accelerated in one hemisphere but precipitating in the opposite one. While the horizontal extent of the spots gives a hint of the size of the interaction region in the equatorial plane, the vertical profile of the footprints provides clues to the energy distribution of the precipitating electrons. Moreover, the location of the footprints can be used as constraints for magnetic field models. Finally, the brightness of the footprints is a valuable diagnostic of the interaction mechanism and has been observed to vary at different time scales, each one tentatively associated with a different process.
Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/136072
10.1029/2011GM001169
http://www.agu.org/books/gm/v197/2011GM001169/2011GM001169.shtml

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