Physics – Plasma Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm11c1779s&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM11C-1779
Physics
Plasma Physics
[2732] Magnetospheric Physics / Magnetosphere Interactions With Satellites And Rings, [6219] Planetary Sciences: Solar System Objects / Io, [7829] Space Plasma Physics / Kinetic Waves And Instabilities
Scientific paper
The volcanic moon Io is the source of much of the plasma in the Jovian magnetosphere. Neutrals originally from Io's volcanoes are ionized in the vicinity of Io and are picked up in the Jovian plasma. We use a hybrid (kinetic ions and fluid electrons) 2-D simulation code to study the interaction of Jovian plasma with Io and kinetic properties of the Jovian plasma near Io. In these calculations we investigate the level of the growth of temperature anisotropy of the Jovian plasma in the immediate neighborhood of Io which may trigger waves via anisotropy driven instabilities. In particular we investigate the places where the thresholds for ion cyclotron and mirror instabilities are met. We study the generation of waves under different properties of the plasma near Io. First we use variable ionization rate of neutral atoms due to the electron impact and photoionization. Second we use different densities of neutrals in Io's atmosphere to change the rate of charge exchanges between plasma ions and atmosphere neutrals.
Hellinger Petr
Sebek O.
Trávníček Pavel M.
Walker Ray J.
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