The Exosphere of Titan and its Interaction With the Kronian Magnetosphere : MIMI Observations and Modeling

Details The Exosphere of Titan and its Interaction With the Kronian Magnetosphere : MIMI Observations and Modeling The Exosphere of Titan and its Interaction With the Kronian Magnetosphere : MIMI Observations and Modeling

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufm.p43a0960g&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #P43A-0960

Physics

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

Scientific paper

Titan's nitrogen-rich atmosphere is directly bombarded by energetic ions, due to its lack of a significant intrinsic magnetic field. Singly-charged energetic ions from Saturn's magnetosphere undergo charge exchange collisions with neutral atoms in Titan's exosphere, being transformed into energetic neutral atoms (ENAs). The Ion and Neutral Camera (INCA), one of the three sensors that comprise the Magnetosphere Imaging Instrument (MIMI) on the Cassini/Huygens mission to Saturn and Titan, images the ENA emissions from various ion/gas interaction regions in the saturnian magnetosphere. During the Cassini's orbits around Saturn, the spacecraft performed several Titan flybys. INCA data acquired during these flybys confirm model predictions of dominant finite ion gyroradii effects, but also reveal a much more complex interaction. These observations are analyzed and compared to simulations, involving non thermal escape and low altitude loss mechanisms. A Titan exosphere model is also proposed.

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