Neutral cometary atmospheres. III - Acceleration of cometary CN by solar radiation pressure

Details Neutral cometary atmospheres. III - Acceleration of cometary CN by solar radiation pressure Neutral cometary atmospheres. III - Acceleration of cometary CN by solar radiation pressure

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...241..830c&link_type=abstract

Astrophysical Journal, Part 1, vol. 241, Oct. 15, 1980, p. 830-837.

Astronomy and Astrophysics

Astrophysics

23

Atmospheric Chemistry, Comets, Cyanides, Particle Acceleration, Photoabsorption, Radiation Pressure, Solar Radiation, Abundance, Hydrocyanic Acid, Photodissociation, Resonance Fluorescence, Comets, Atmosphere, Acceleration, Cyanide, Solar Radiation, Pressure, Monte Carlo Techniques, Models, Brightness, Spectrometry, Bennett Comet, West Comet, Resonance, Fluorescence, Photochemistry, Velocity, Comae, Photodissociation, Intensity, Spectrograms, Comparisons, Comet Tails, Kohoutek Comet

Scientific paper

The acceleration of cometary CN radicals due to solar radiation pressure has been determined by fitting Monte Carlo models to nine observed sunward-tailward pairs of brightness profiles of the (0-0) band of CN at 3883 A. The profiles were determined from spectrograms of comets Bennett 1970 II and West 1976 VI. The values of the observed acceleration agree with those computed from resonance fluorescence calculations to within the expected uncertainties. This provides an independent confirmation of the identification of the observed scale lengths with the photochemical lifetimes and velocities associated with the production of observed cometary CN by the photodissociation of HCN. The ratio of the intensity of the (0-1) band of CN at 4216 A to the (0-0) band at 3883 A has been determined from spectrograms of comet West, and is compared with theoretical values.

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