Protostellar condensations within the Orion ridge
Aperture synthesis observations of the CS J = 2 to 1 line and 95 GHz continuum emission from a 2 arcmin x 3 arcmin region around IRc2 in the OMC-1 molecular cloud have been obtained at 7.5 arcsec resolution with the Owens Valley Radio Observatory millimeter interferometer. These observations reveal four distinct condensations with the OMC-1 molecular ridge. The condensations lie along the edge of the bright central part of the H II region, M 42, suggesting that they may have been formed as a result of shock compression driven by the H II region. Their masses and densities, M about 50 solar masses and n about 10 to the 6th - 10 to the 7th/cu cm, suggest that the condensations will undergo further massive star formation on a short time scale (about 20,000 yr). 20 references.
- Research Organization:
- Owens Valley Radio Observatory, Big Pine, CA
- OSTI ID:
- 5266694
- Journal Information:
- Astrophys. J.; (United States), Vol. 304
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
NEBULAE
PROTOSTARS
STAR EVOLUTION
EMISSION SPECTRA
H2 REGIONS
MAPS
SHOCK WAVES
WAVE PROPAGATION
COSMIC RADIO SOURCES
SPECTRA
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources
640105 - Astrophysics & Cosmology- Galaxies