HST UV Observations Of The Extended Atmosphere Of Titan

Details HST UV Observations Of The Extended Atmosphere Of Titan HST UV Observations Of The Extended Atmosphere Of Titan

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.3616c&link_type=abstract

American Astronomical Society, DPS meeting #42, #36.16; Bulletin of the American Astronomical Society, Vol. 42, p.1068

Astronomy and Astrophysics

Astronomy

Scientific paper

UV observations of Titan using the HST ACS/SBC channel have been performed in early 2009 during the transits of Titan across the disc of Saturn. A combination of absorption of Saturn's reflected solar UV emission in transit, and extended emissions primarily from H atoms away from transit, have been made to learn about the structure of Titan's extended upper atmosphere. The data have been reduced and initial profiles with altitude will be presented, showing both a strong absorption edge at the altitude of the haze layers and extended H Ly alpha emission corresponding to the hydrogen corona. It is hoped that these observations will provide new constraints on theoretical models for a hydrodynamic flow of species through Titan's exobase level, resulting from the interpretation of recent Cassini measurements at Titan.

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