Io's Neutral Atmosphere (Interaction with the Io Plasma Torus)

Details Io's Neutral Atmosphere (Interaction with the Io Plasma Torus) Io's Neutral Atmosphere (Interaction with the Io Plasma Torus)

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999dps....31.7803m&link_type=abstract

American Astronomical Society, DPS meeting #31, #78.03

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Scientific paper

The interaction of Io's atmosphere with the Io plasma torus gives rise to the Iogenic plasma source. The Iogenic plasma source is highly relevant to a number of other important phenomena in the Jovian system including the structure and outward transport of the plasma torus and a significant number of coupled electrodynamic interactions that have been observed by ground-based, earth-orbiting, and interplanetary spacecraft instruments, to occur between the plasma torus, Io, and Jupiter. In this work we apply a spatially 3-D axisymmetric hybrid fluid/kinetic model (Marconi et al Ap.J. 469,393, 1996) which includes SO2, SO, O, S, O2, and a generic plasma species. Neutral-neutral chemistry is included as well as collisional and chemical interactions with the plasma which is treated as a fast stream of particles impinging on the upper atmosphere of Io. The structure and dynamics of the neutral component of Io's atmosphere, velocity distributions for O and S at the exobase, plasma source rates and neutral escape rates will be presented.

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