Does CO condense on dust in molecular clouds?

Details Does CO condense on dust in molecular clouds? Does CO condense on dust in molecular clouds?

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...123..271l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 123, no. 2, July 1983, p. 271-278.

Astronomy and Astrophysics

Astrophysics

57

Carbon Monoxide, Cosmic Dust, Interstellar Chemistry, Molecular Clouds, Condensing, Desorption, Molecular Collisions, Vapor Pressure

Scientific paper

The possibility that carbon monoxide condenses onto dust grains in dark molecular clouds is examined. An attempt is made to evaluate the temperature of dark cloud grains, and the CO saturated vapor pressure is calculated as a function of temperature on different grain surfaces, deducing the expected depletion in dark clouds. The situation of observational searches for CO depletion is reviewed, and it is concluded that the present data imply the existence of an efficient desorption mechanism. It should operate for several molecules observed in dark clouds including CO and N2, and it should increase the latter by at least an order of magnitude.

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