Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm11c1776w&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM11C-1776
Physics
[2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions, [2753] Magnetospheric Physics / Numerical Modeling, [5737] Planetary Sciences: Fluid Planets / Magnetospheres
Scientific paper
Multi-fluid/Multi-Scale simulations are used to investigate the induced magnetosphere around Io and the mass loading on the Jovian magnetosphere from the induced outflows from Io. The simulations have been improved so that a stable torus plasma within the Jovian magnetosphere is established before inserting Io through the multi-scale aspects of the code. It is shown that because of the strong magnetic field at Io, most of the outflow is launch along the field lines leading to an ion tail that is a few Jovian radii in height. This sheet of plasma then convective drifts in the azimuthal direction. This wall of plasma is subject to small-scale interchange instabilities that lead to the rippling plasma with resultant enhancements in both number and current density. The resultant density profile is compared with published profiles of the Io plasma torus. These enhancements are proposed as a mechanism for the patchy auroral emissions in Jupiter’s ionosphere that are associated with Io’s plasma interaction with the Jovian magnetosphere.
Harnett Erika M.
Waldock J.
Winglee Robert
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