The mass spectrum of interstellar clouds

Details The mass spectrum of interstellar clouds The mass spectrum of interstellar clouds

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...341..201d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 341, June 1, 1989, p. 201-207. Research supported by NASA IRAS Extended Mis

Astronomy and Astrophysics

Astronomy

45

Absorption Spectra, Abundance, Interstellar Gas, Mass Spectra, Molecular Clouds, Radio Sources (Astronomy), Line Of Sight, Optical Thickness, Star Formation

Scientific paper

The abundances of diffuse clouds and molecular clouds in the inner Galaxy and at the solar circle are compared. Using results of recent low-latitude 21 cm absorption studies, the number of diffuse clouds per kiloparsec along the line of sight is derived as a function of the cloud column density, under two assumptions relating cloud densities and temperatures. The density of clouds is derived as a function of cloud mass. The results are consistent with a single, continuous mass spectrum for interstellar clouds from less than 1 solar mass to 1,000,000 solar masses, with perhaps a change of slope at masses where the atomic and molecular mass fractions are roughly equal.

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