Titan's plasma environment: 3D hybrid simulation and comparison with observations

Details Titan's plasma environment: 3D hybrid simulation and comparison with observations Titan's plasma environment: 3D hybrid simulation and comparison with observations

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufm.p23b1366l&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #P23B-1366

Physics

2459 Planetary Ionospheres (5435, 5729, 6026), 2736 Magnetosphere/Ionosphere Interactions (2431), 2753 Numerical Modeling, 2780 Solar Wind Interactions With Unmagnetized Bodies

Scientific paper

A multiscale combined (fluid--kinetic) numerical method allows us to use more realistic plasma models at Titan. This method takes into account charge-exchange and photoionization processes. We study the Titan's plasma environment in case of high, intermediate and low exosphere density in Chamberlain models. The background ions H+, O+ and pickup ions H2+, CH4+ and N2+ are described in a kinetic approximation, where the electrons are approximated as a fluid. We also include an immobile ionosphere at the height 1300km. In this report we consider the multiscale spatial structure for plasma and electromagnetic field, and the velocity distribution of ions that results from the coupling between background ions and pickup ions. Special attention will be paid for the comparisons our numerical results with Voyager and Cassini observations (see e.g. [Sittler, Hartle, et al., 2005; Hartle, Sittler et al., 2006]). We shall estimate of mass loading rate for Ta, energy input to upper atmosphere from ambient +pickup ions, and the T9 encounter with two crossings. \newline E C Sittler Jr., R E Hartle, A F Vinas, R E Johnson, H T Smith and I Mueller-Wodarg, J. Geophys. Res., 110, A09302, 2005. R E Hartle, E C Sittler, F M Neubauer, R E Johnson, et al., Planet. Space Sci., 54, 1211, 2006.

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