Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000dps....32.1210b&link_type=abstract
American Astronomical Society, DPS Meeting #32, #12.10; Bulletin of the American Astronomical Society, Vol. 32, p.1013
Astronomy and Astrophysics
Astronomy
Scientific paper
Simultaneous re-analysis of respectively the Voyager 2 UVS stellar Occultation observations obtained during the spacecraft encounter with Saturn and an IUE albedo spectrum of the planet obtained in 1983, provided the height distributions of eleven minor constituents from the top of the troposphere up to the atmospheric homopause region. These constituents are: CH4, C2H2, C2H4, C4H2, C2H6, H2O, GeH4, PH3, AsH3, CO2, and NH3. A thin layer of H2O is discovered near altitude 625 km. Our results seem to be consistent with HC abundances recently derived from ISO observations (Feng et al., 2000). We use the derived HC distribution to model the H Lyman-alpha and He 584 A airglow of Saturn observed by Voyager UVS in 1982, with a focus on the helium abundance in the upper atmosphere.
Ben-Jaffel Lotfi
Feng Donglai
Herbert Fritz
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