Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999baas...31.1584f&link_type=abstract
American Astronomical Society, DPS Meeting #31, late abstracts, #59.05; Bulletin of the American Astronomical Society, Vol. 31,
Astronomy and Astrophysics
Astronomy
Scientific paper
Atomic carbon may escape from the atmosphere of Mars by a number of non-thermal mechanisms, which may be photochemical or mechanical processes, such as sputtering. We present model calculations of the escape rate of C by the photochemical escape mechanisms, including dissociative recombination of CO+, photodissociation and photodissociative ionization of CO, electron impact dissociation and dissociative ionization of CO, and a few chemical reactions. Our background model is based on the MTGCM model of Bougher and co-workers, and the solar fluxes are from the solar flux model of Ayres. We find that the most important escape mechanism is dissociative recombination of CO+, but photodissociation may also make a signficant contribution if the mixing ratio of CO is larger at high solar activity than at low solar activity.
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