Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p51c1135s&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #P51C-1135
Physics
[6280] Planetary Sciences: Solar System Objects / Saturnian Satellites, [6281] Planetary Sciences: Solar System Objects / Titan
Scientific paper
We discuss the results of the hybrid simulation of Titan's environment in case of T9 encounter. The simulations are based on recent analysis of the Cassini Plasma Spectrometer (CAPS) ion measurements during the T9 flyby through the induced magnetic tail of Titan [1]. This new result changes our previous model of the interaction of Saturn's rotating magnetosphere with Titan from one that was discussed in the recent publications. In our model the background ions, all pickup ions, and ionospheric ions are considered as a particles, whereas the electrons are described as a fluid. Inhomogeneous photoionization, electron-impact ionization and charge exchange are included in our model. The temperature of the background electrons and pickup electrons was also included into the generalized Ohm's law. We also take into account the collisions between the ions and neutrals. The current simulation shows that mass loading by pickup ions H+, H2+, CH4+ and N2+ is stronger than in the previous simulations. We consider two models for the upstream composition: (a) only magnetospheric H+ ions, (b) only pickup H+ ions. In our hybrid simulations we use Chamberlain profiles for the exosphere's components. We also include a simple ionosphere model with M=28 ions that were generated inside the ionosphere. The moon is considered as weakly conducting body. Special attention will be paid to comparing our numerical results for the models (a) and (b) with CAPS's T-9 observations. References [1] Sittler, et al., Saturn's Magnetospheric Interaction with Titan as Defined by Cassini Encounters T9 and T18: New Results, Planet. Space Sci., 2009 (submitted).
Hartle Richard E.
Lipatov Alexander S.
Simpson David G.
Sittler Edward C.
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