(C-13)O and (C-12)O observations of cold IRAS unidentified point sources in the Galaxy

Details (C-13)O and (C-12)O observations of cold IRAS unidentified point sources in the Galaxy (C-13)O and (C-12)O observations of cold IRAS unidentified point sources in the Galaxy

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...169..281c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 169, no. 1-2, Nov. 1986, p. 281-297.

Astronomy and Astrophysics

Astronomy

116

Carbon Monoxide, Galactic Radiation, Infrared Sources (Astronomy), Point Sources, Infrared Astronomy Satellite, Molecular Clouds, Morphology, Radio Astronomy, Star Formation

Scientific paper

Observations of 13CO and 12CO have been made in the direction of 96 infrared sources selected from the IRAS point-source catalogue, and having a flux density at 100 μm greater than at 60 μm, so that their color temperature T(60/100) is lower than 50K. Among these objects, 83 have been detected in 13CO and 37 have been mapped. About half of the associated molecular clouds have a "globule-like" morphology. The other half corresponds to extensions of molecular clouds associated to H II regions. The authors have observed 24 sources in 12CO; 50% are good candidates for having molecular flows. For two of them the presence of outflows has been confirmed. Therefore these cold IRAS sources are very likely to be pre-main-sequence stars still embedded in their parent molecular cloud. The authors also derive a relationship between the total infrared luminosity and the total H2 mass in a 4arcmin.4 beam centered on the IR source: Lir is proportional to M(H2)1.4.

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