On the massive star-forming capacity of molecular clouds

Details On the massive star-forming capacity of molecular clouds On the massive star-forming capacity of molecular clouds

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...436..795f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 436, no. 2, p. 795-799

Astronomy and Astrophysics

Astrophysics

68

B Stars, H Ii Regions, Massive Stars, Molecular Clouds, O Stars, Photoionization, Star Formation, Stellar Evolution, Interstellar Gas, Molecular Gases, Stellar Mass

Scientific paper

Assuming that photoionization is the self-limiting process for continued star formation, we estimate the maximum number of massive (OB) stars that can form within a molecular cloud. The most efficient cloud destruction mechanism in the early stages of H II region evolution is the evaporation of the cloud by stars located near the cloud boundary. The maximum number of OB stars is of order 1 per 104 solar mass of average molecular gas, or 10 per 104 solar mass of dense molecular gas. The resulting star-forming efficiencies within cloud complexes range from 2% to 16% depending on both the location of the stars in the cloud and the details of the initial mass function, with an overall value of about 5% for average molecular gas.

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