Desorption of molecules from interstellar grains and the heating of dust clouds

Details Desorption of molecules from interstellar grains and the heating of dust clouds Desorption of molecules from interstellar grains and the heating of dust clouds

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..45..261d&link_type=abstract

Astrophysics and Space Science, vol. 45, Dec. 1976, p. 261-267. Research supported by the National Research Council of Canada.

Astronomy and Astrophysics

Astrophysics

11

Cosmic Dust, Desorption, Gas Heating, Interstellar Matter, Ultraviolet Radiation, Cosmic Rays, Energy Absorption, Gas Temperature, Granular Materials, Photoelectrons, Radiant Heating

Scientific paper

Temperature fluctuations induced in very small (radii of the order of 0.001 micron) interstellar grains by the absorption of photons from the ultraviolet radiation field or by energy released on molecule formation are shown to lead to significant gas heating due to thermal desorption of condensed atoms or molecules. For clouds with hydrogen column densities of 1 to 10 by 10 to the 20th power per sq cm, heating rates due to this process are comparable to direct heating by cosmic rays or grain photoelectrons.

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