Astrophysics and Space Science

, Volume 45, Issue 2, pp 261–267 | Cite as

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

  • W. W. Duley
Article

Abstract

Temperature fluctuations induced in very small (r≃10−3 μ) interstellar grains by the absorption of photons from the ultra-violet 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 N(H)=1–10×1020 cm−2, heating rates due to this process are comparable to direct heating by cosmic rays or grain photoelectrons.

Keywords

Radiation Dust Heating Rate Temperature Fluctuation Radiation Field 

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Copyright information

© D. Reidel Publishing Company 1976

Authors and Affiliations

  • W. W. Duley
    • 1
  1. 1.Physics DepartmentYork UniversityTorontoCanada

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