On the photochemical formation of CN, C2, and C3 radicals in cometary comae

Details On the photochemical formation of CN, C2, and C3 radicals in cometary comae On the photochemical formation of CN, C2, and C3 radicals in cometary comae

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981m%26p....24..453y&link_type=abstract

Moon and the Planets, vol. 24, June 1981, p. 453-463.

Astronomy and Astrophysics

Astronomy

17

Carbon, Comets, Cyanides, Free Radicals, Photodissociation, Photolysis, Astronomical Spectroscopy, Comet Nuclei, Density Distribution, Light Curve, Photochemical Reactions, Reaction Kinetics

Scientific paper

The formation of cometary CN, C2, and C3 radicals is investigated in a photochemical reaction scheme. From an analysis of the observed brightness profiles of these radicals, it is shown that CN is formed as a primary product in the photolysis of its parent molecules, whereas C2 and C3 are formed via two-step photodissociation of their parents. It is suggested that the major parent of C2 is a different species from those of CN and C3 on the basis of the difference of the variation with heliocentric distance of the sublimation rate of the parents of these radicals. Parent molecules and reaction schemes for the formation of these radicals are discussed.

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