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15 February 2019
Article (Scientific journals)
Alfvén Wave Propagation in the Io Plasma Torus
Hinton, P. C.; Bagenal, F.; Bonfond, Bertrand 
2019 • In Geophysical Research Letters, 0 (0)
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Keywords :
Jupiter; Io; Io footprint; Alfvén waves
Abstract :
[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.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
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)
Language :
English
Title :
Alfvén Wave Propagation in the Io Plasma Torus
Publication date :
31 January 2019
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
Wiley, Washington, United States - District of Columbia
Volume :
0
Issue :
0
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique

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