CO^+^ in the Orion Bar, M17 and S140 star-forming regions.

Details CO^+^ in the Orion Bar, M17 and S140 star-forming regions. CO^+^ in the Orion Bar, M17 and S140 star-forming regions.

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...296l...9s&link_type=abstract

Astronomy and Astrophysics, v.296, p.L9

Astronomy and Astrophysics

Astrophysics

39

Line: Formation, Ism: Clouds, Ism: Molecules, Radio Lines: Interstellar

Scientific paper

We present an observational study of mm-wave CO^+^ N=2-1, J=5/2-3/2 and J=3/2-1/2 rotational emission from star-forming molecular clouds in Orion, M17 and S140. Intense CO^+^ line emission is produced in the molecular cloud/HII region interfaces in the Orion Bar and M17 SW with peak integrated intensities of 1.3 to 1.9Kkm/s in the J=5/2-3/2 line. In S140 we derive an upper limit of 30mK for this line. The observed CO^+^ emission is likely produced in the photon-dominated regions on the surfaces of dense molecular clumps at the cloud edges.

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