Emission by OD in comets

Details Emission by OD in comets Emission by OD in comets

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...297..826a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 297, Oct. 15, 1985, p. 826-836.

Other

10

Abundance, Comets, Deuterium Compounds, Molecular Spectra, Oxygen Compounds, Ultraviolet Spectra, Cosmochemistry, Fluorescence, Halley'S Comet, Iue, Radial Velocity

Scientific paper

A calculation has been made of the complete fluorescent equilibrium of OD in sunlight including ultraviolet (A-X) transitions, vibrational and rotational transitions (A-A and X-X), and Lambda-doubling transitions in the X state. The dependence on heliocentric radial velocity is strong. No lines of OD are visible in any cometary spectra taken with IUE, but the limits vary, considerably from one comet to another. In the most favorable case, comet Austin 1982 VI, the limit is OD/OH less than 0.004. Optimum conditions for detecting OD in comet Halley are also discussed.

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