A millimeter-wave spectral-line and continuum survey of cold IRAS sources

Details A millimeter-wave spectral-line and continuum survey of cold IRAS sources A millimeter-wave spectral-line and continuum survey of cold IRAS sources

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...345..257w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 345, Oct. 1, 1989, p. 257-264.

Astronomy and Astrophysics

Astronomy

119

Astronomical Spectroscopy, Infrared Sources (Astronomy), Millimeter Waves, Sky Surveys (Astronomy), Star Formation, Continuous Radiation, Cosmic Dust, Emission Spectra, Infrared Astronomy Satellite, Luminosity, Spectral Energy Distribution

Scientific paper

The results of a CO, millimeter-wave continuum, and radio continuum survey of a sample of 50 IRAS sources selected to have cold, bright, far-IR emission and no optical counterparts are presented. The majority of these sources are found to be associated with recent star formation as evidenced by the presence of strong CO emission and high gas column densities along the line of sight. Interferometric observations in the 2.7 mm continuum detected emission from cold dust on scales of less than 35 arcsec in 16 of 39 sources. Source sizes, dust optical depths, masses, and spatial gas densities of these compact dust structures are derived. Two broad classes of dust emission regions are identified: (1) small or unresolved dust structures characterized by high spatial gas densities and large dust optical depths, and (2) extended dust envelopes displaying relatively lower spatial gas densities and dust optical depths.

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