Astronomy and Astrophysics – Astronomy
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...340..265w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 340, May 1, 1989, p. 265-272.
Astronomy and Astrophysics
Astronomy
435
H Ii Regions, Milky Way Galaxy, Molecular Clouds, Spatial Distribution, Star Formation, Stellar Mass, Far Infrared Radiation, Giant Stars, Infrared Sources (Astronomy), Main Sequence Stars, Solar Neighborhood
Scientific paper
A new method for identifying massive stars inside molecular clouds is described which makes use of their characteristic FIR flux density distribution. A two-color selection criterion has been developed and carefully calibrated using stars which are known to be embedded in molecular clouds. When applied to the sensitive IRAS all-sky survey, a direct measure of the total number and distribution of embedded massive stars in the Galaxy is obtained. A lower limit is derived on the current O star formation rate in the Galaxy, the contribution O stars make to the FIR luminosity of the Galaxy is estimated, and it is shown that the number of IRAS sources found is consistent with a Galactic supernova rate of about one every 25 yrs.
Churchwell Edward
Wood Douglas O. S.
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