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).

Scoville, Nicholas Z.California Institute of Technology, Pasadena, CA, USA (author)
Bååth, Lars B.,1948-Onsala Space Observatory, Onsala, Sweden(Swepub:hh)baath (author)
Masson, Colin R.California Institute of Technology, Pasadena, CA, USA (author)
Woody, David P.Owens Valley Radio Observatory, Big Pine, CA, USA (author)
California Institute of Technology, Pasadena, CA, USAOnsala Space Observatory, Onsala, Sweden (creator_code:org_t)

In:Astrophysical JournalPhiladelphia, PA : Institute of Physics Publishing (IOPP)304:2, s. L51-L550004-637X1538-4357

By the author/editor: Mundy, Lee G.; Scoville, Nichol ...; Bååth, Lars B., ...; Masson, Colin R.; Woody, David P.

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

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