Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.p13a0148g&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #P13A-0148
Physics
0328 Exosphere, 2732 Magnetosphere Interactions With Satellites And Rings, 3360 Remote Sensing, 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. The INCA data acquired during these flybys reveal a complex interaction. These observations were analyzed and compared to simulations, leading to a new exosphere model and to a study of the loss mechanisms for ENAs in the lower exosphere. A statistical analysis of both INCA and LEMMS data is also performed, showing the great variability of the ENA environment of Titan during the various flybys.
C:son Brandt Pontus
Dandouras Iannis
Garnier Paul
Hamilton Douglas C.
Krimigis Stamatios M.
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