Photodestruction rates for cometary parent molecules

Details Photodestruction rates for cometary parent molecules Photodestruction rates for cometary parent molecules

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.3777c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. E2, p. 3777-3781

Other

50

Absorption Spectra, Comets, Lyman Alpha Radiation, Molecular Spectra, Photodecomposition, Reaction Kinetics, Ultraviolet Spectra, Acetic Acid, Alcohols, Aldehydes, Benzene, Carbon Dioxide, Carbon Monoxide, Formic Acid, Heavy Water, Hydrocarbons, Hydrogen Peroxide, Methyl Compounds, Nitrogen Compounds, Sulfur Compounds, Ultraviolet Spectroscopy, Water, Comets, Parent Molecules, Molecular Processes, Water, Hydrocarbons, Data, Photochemistry, Comae, Comet Nuclei, Nitrogen, Sulfur, Solar Effects, Carbon, Photod

Scientific paper

New evaluations of the photodestruction rates for several molecules of cometary interest are presented along with a critical comparison with other estimations from 1976 to 1993, and a summary of the need for future laboratory measurements. Photodestruction rates for a heliocentric distance of 1 AU (assuming the quiet Sun reference spectrum of Huebner and Carpenter) are tabulated for molecules from the water group, hydrocarbons, CO group, CHO species, nitrogen compounds, and sulfur compounds. Inspection of the table shows reasonable agreement between new and previously calculated photodestruction rates. Further work is needed on unstable species, photodissociation channel and quantum yields, temperature effects, kinematics and anistropic ejection of the fragments, and the effects of solar radiation field variations.

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