Explosive desorption of icy grain mantles in dense clouds

Details Explosive desorption of icy grain mantles in dense clouds Explosive desorption of icy grain mantles in dense clouds

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...244..190s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 244, no. 1, April 1991, p. 190-204. NASA-supported research.

Astronomy and Astrophysics

Astrophysics

52

Abundance, Cosmic Dust, Desorption, Ice, Interstellar Matter, Molecular Clouds, Absorption Spectra, Astronomical Models, Explosions, Particle Size Distribution, Ultraviolet Radiation

Scientific paper

The cycling of the condensible material in dense clouds between the gas phase and the icy grain mantles is investigated. In the model studied, desorption of the ice occurs due to grain mantle explosions when photochemically stored energy is released after transient heating by a cosmic ray particle. It is shown that, depending on the grain size distribution in dense clouds, explosive desorption can maintain up to about eight percent of the carbon in the form of CO in the gas phase at typical cloud densities.

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