Alfvén Wave Propagation in the Io Plasma Torus

Hinton, P. C.; Bagenal, F.; Bonfond, Bertrand

doi:10.1029/2018GL081472

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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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https://hdl.handle.net/2268/232954

DOI
10.1029/2018GL081472

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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 :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018GL081472

Funders :

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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since 15 February 2019

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