Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm33c0461p&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SM33C-0461
Physics
2716 Energetic Particles: Precipitating, 2740 Magnetospheric Configuration And Dynamics, 2753 Numerical Modeling, 6222 Ganymede, 7846 Plasma Energization
Scientific paper
Observations of aurora at the icy Galilean satellite Ganymede and at its magnetic footprint near Jupiter's auroral oval have inspired many questions pertaining to plasma acceleration mechanisms of this rare magnetosphere-magnetosphere interaction. This particular system is also unique because it is currently the only know example of a sub-Alfvenic magnetized plasma incident upon a magnetosphere. We investigate the interaction of Ganymede's magnetosphere with the surrounding co-rotational magnetosphere of Jupiter using 3D multi-fluid simulations, which allow tracking of several plasma species and their differential acceleration. High resolution simulations enable a complete treatment of the ion cyclotron motion as well as the resultant acceleration of the different ion species with various charge-to-mass ratios which are present in Ganymede's near space environment. Specifically, we examine the how light and heavy mass ions from ionospheric outflow mix and interact in Ganymede's magnetotail, and the acceleration mechanisms that lead to particle precipitation, aurora and sputtering. The simulations are compared to observations made by multiple instruments on the Galileo spacecraft and the STIS on Hubble Space Telescope in order to groundtruth the results and our conclusions.
Paterson William
Paty Carol
Winglee Robert
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