Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.2702l&link_type=abstract
American Astronomical Society, DPS meeting #38, #27.02; Bulletin of the American Astronomical Society, Vol. 38, p.527
Astronomy and Astrophysics
Astronomy
Scientific paper
Understanding the interaction of Saturn's moon Titan with Saturn's magnetospheric plasma is one of the primary goals of the Cassini mission. The Cassini Ion Neutral Camera (INCA)has imaged Energetic neutral atoms (ENAs) generated by charge-exchange reactions between the energetic magnetospheric ions and Titan's neutral atmosphere. INCA found a halo of ENA emissions about Titan that fades at larger distances as the neutral exospheric density decreases. The altitude profiles and intensity of the ENA emissions varied and was distributed asymmetrically about Titan, reflecting the complexity of the interaction. We explore the possibility that some of the altitude profile and intensity variability in the ENA observations is the result of the upper atmosphere responding to the injection of energetic magnetospheric H+. Spatial and angular distribution of these ions are calculated as they cross the exobase. The energy deposition of the ions and the resulting expansion of Titan's upper atmosphere are also examined.
Dandouras Jannis
Johnson Robert E.
Ledvina Stephen
Luhmann Janet G.
Michael Morris
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