Vertical Structure of Titan's Ionosphere

Details Vertical Structure of Titan's Ionosphere Vertical Structure of Titan's Ionosphere

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.3604y&link_type=abstract

American Astronomical Society, DPS meeting #38, #36.04; Bulletin of the American Astronomical Society, Vol. 38, p.549

Astronomy and Astrophysics

Astronomy

Scientific paper

Examination of the altitude profiles of ion density in Titan's atmosphere shows that the ions can be divided into two classes: those with structured altitude profiles and those with smooth altitude profiles. The ions with structured altitude profiles include N+, CH4+, and CH3+, and those with smooth profiles include C3H3+, CH2NH2+, and C4H7+.
The former group of ions are characterized by short chemical time constants and the latter group by long chemical time constants; therefore, we interpret the different altitude variations of the groups as evidence for the importance of diffusion in Titan ionosphere. It follows that the structure seen in the altitude profile of the short-lived ions is caused by variations in the local ionization rate. One dimensional models incorporated the effects of ion diffusion will be presented and compared to the ion density observations.

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