Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287..671r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 287, Dec. 15, 1984, p. 671-675.
Astronomy and Astrophysics
Astrophysics
23
Astrophysics, Molecular Clouds, Protostars, Star Formation, Carbon Monoxide, Galactic Nuclei, Infrared Astronomy, Luminosity, Milky Way Galaxy
Scientific paper
From the existing data in the literature it is shown that there is a linear correlation between cloud mass derived from CO observations and the associated luminosity obtained from far-IR observations over a large luminosity range of 10 to the 4th to 10 to the 8th solar luminosities. The mean value of luminosity per unit mass for a giant molecular cloud is 5.6 solar-L/solar-M. The star-forming efficiency of the molecular cloud over its lifetime of 5-10 x 10 to the 7th yr is found to be 0.2-0.3, which yields the present star-forming rate of 6-11 solar masses per year. Furthermore, the integral luminosity distribution is a power-law with an exponent of about -0.5. The correlation between cloud mass and the far-IR luminosity observed for a sample of nuclei of external galaxies corresponds to molecular clouds similar to those in the Galaxy.
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