[en] Abstract Io, the most volcanically active body in the solar system, fuels a plasma torus around Jupiter with dissociation products of SO2 at a rate of ~1,000 kg/s. We use a combination of in situ Voyager 1 data and Cassini Ultraviolet Imaging Spectrograph observations to constrain a diffusive equilibrium model of the Io plasma torus. The interaction of the Io plasma torus with Io launches Alfvén waves in both directions along magnetic field lines. We use the recent Juno-based JRM09 magnetic field model combined with our 3-D model of the Io plasma torus to simulate the propagation of Alfvén waves from the moon to the ionosphere of Jupiter. We map the location of multiple reflections of iogenic Alfvén waves between the northern and southern hemispheres. The location of the first few bounces of the Alfvén wave pattern match the Io auroral footprints observed by the Hubble Space Telescope.
Centre de recherche :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Aérospatiale, astronomie & astrophysique
Auteur, co-auteur :
Hinton, P. C.
Bagenal, F.
Bonfond, Bertrand ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Langue du document :
Anglais
Titre :
Alfvén Wave Propagation in the Io Plasma Torus
Date de publication/diffusion :
31 janvier 2019
Titre du périodique :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Maison d'édition :
Wiley, Washington, Etats-Unis - District de Columbia
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE] BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
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