Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..801o&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 97, March 1989, p. 801-808. Research supported by the U.S. Navy.
Astronomy and Astrophysics
Astronomy
19
Early Stars, Infrared Astronomy Satellite, Radio Sources (Astronomy), Sky Surveys (Astronomy), Emission Spectra, Far Infrared Radiation, H Ii Regions, Molecular Clouds, Spectral Line Width, Star Formation, T Tauri Stars
Scientific paper
From a study of the Infrared Astronomical Satellite Point Source Catalog, 159 objects similar to young B0 and early A type ZAMS stars were identified in the Cygnus X region. Among the optical identifications obtained are two unusual ringlike objects, IRAS 20286 + 4105 and 20236 + 4058; 13 compact nebulae often showing a biconical shape; and 11 sources coincident with bright, starlike objects. It is likely that the IRAS survey has detected all of the young, far-IR emitting, B type stars within about 3 kpc, the majority coincident with known molecular clouds. The inferred luminosity function implies a young stellar object density of 0.0002-0.0003 stars/cu pc for L greater than 10 solar luminosities, similar to estimates for optically identifiable B and early A type stars in the Galactic disk population as a whole.
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