On the monochromatic brightness variations of comets

Details On the monochromatic brightness variations of comets On the monochromatic brightness variations of comets

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978m%26p....18...77m&link_type=abstract

Moon and the Planets, vol. 18, Feb. 1978, p. 77-89.

Computer Science

14

Comets, Luminous Intensity, Monochromatic Radiation, Acetylene, Atmospheric Composition, Clathrates, Coma, Comet Nuclei, Cyanides, Hydroxyl Emission, Unsteady State

Scientific paper

The nonsteady development of the multispecies atmosphere of a long-period comet approaching the sun is modeled, and the associated monochromatic brightness variations are discussed in terms of the varying abundances of the atmospheric species. A simple homogeneous clathrate structure, 85% of which is H2O, provides the representation for the cometary nucleus. Monochromatic brightness variations of the emission bands due to OH, CN and C2 are found to follow the law proposed by Levin (1943) for small heliocentric distance where a quasi-steady approximation is valid. However, the large time-scales of residence for emitting species leads to a breakdown of Levin's law at large heliocentric distances.

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