Carbon and oxygen production rates for comet Kohoutek /1973 XII/

Computer Science – Sound

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Abundance, Atomic Spectra, Kohoutek Comet, Rocket Sounding, Ultraviolet Spectra, Astronomical Spectroscopy, Carbon, Flow Velocity, Gas Evolution, Hydrogen Atoms, Mass Ratios, Oxygen Atoms, Photoionization

Scientific paper

Data obtained during sounding-rocket observations of the 1304-A atomic oxygen resonance line and the 1657-A atomic carbon resonance line in the coma of comet Kohoutek are reduced, and production rates are derived for both species. Isodensity contour plots and radial brightness plots are constructed; scale lengths and luminosities are determined for the O and C comas at a heliocentric distance of 0.43 AU. Computations yield production rates of 1.47 by 10 to the 29th power atoms/sec for O and 8.6 by 10 to the 28th power atoms/sec for C. Potential sources of error are noted, and problems of fitting the data to the water-ice clathrate model of the nucleus are discussed. The results indicate that carbon in some form or forms was a major constituent of the comet and that the O/C ratio was about 2, in agreement with analyses of the composition of carbonaceous chondrites and solar abundances in general.

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