A non Thermal Model for the Titan Extended Exosphere

Details A non Thermal Model for the Titan Extended Exosphere A non Thermal Model for the Titan Extended Exosphere

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufm.p43a1010g&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #P43A-1010

Physics

0328 Exosphere, 2732 Magnetosphere Interactions With Satellites And Rings, 6281 Titan

Scientific paper

The recent results of the INMS instrument, onboard Cassini, have shown evidence for a hot Titan corona, with non thermal profiles for N2 and CH4 in the lower exosphere (below 2000 km altitude). We propose here to use these observations for modelling the extended non thermal exosphere of Titan, through the use of non thermal distributions at the exobase. Non thermal extended exospheric profiles are first deduced for the Titan flybys Ta (26th october 2004), Tb (13th december 2004) and T5 (16th april 2005). Then, we propose a non thermal exosphere model averaged over the two first two flybys, whose conditions were very similar, for the five main species at the exobase : H, H2, N, N2 and CH4. This model is then used to simulate the production of energetic neutral atoms (ENAs) in the Titan exosphere, and the results are compared to the observations of the MIMI INCA ENA imager onboard Cassini.

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