The formation and role of water dimers in a cometary atmosphere, with application to Comet P/Halley

Details The formation and role of water dimers in a cometary atmosphere, with application to Comet P/Halley The formation and role of water dimers in a cometary atmosphere, with application to Comet P/Halley

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...383..351c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 383, Dec. 10, 1991, p. 351-355. Research supported by Alexander von Humbold

Astronomy and Astrophysics

Astrophysics

10

Cometary Atmospheres, Dimers, Halley'S Comet, Water, Astronomical Models, Cosmochemistry, Metastable State, Molecular Structure

Scientific paper

The formation of water dimers in a cometary coma is comprehensively modeled, using recent thermochemical data and plausible chemical schemes. For P/Halley at the time of the 1986 flyby missions, the computed dimer mole fraction is everywhere smaller than 10 exp -5. The model is also used to confirm the earlier results of Crifo concerning the partial recondensation of the coma water into large clusters, which unavoidably follows the formation of the dimers.

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