CO (J = 4 - 3) spectroscopy in M 17 SW and OMC1

Details CO (J = 4 - 3) spectroscopy in M 17 SW and OMC1 CO (J = 4 - 3) spectroscopy in M 17 SW and OMC1

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...142..363s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 142, no. 2, Jan. 1985, p. 363-366.

Astronomy and Astrophysics

Astrophysics

8

Astronomical Spectroscopy, Carbon Monoxide, Interstellar Gas, Molecular Clouds, Gas Density, H Ii Regions, Line Spectra, Molecular Spectra, Optical Transition, Orion Constellation

Scientific paper

The authors present spectra of the J = 4 - 3 transition of CO in the Kleinmann-Low object of Orion and in IRc1 in the molecular cloud M17 SW. OMC1 was observed for calibration. IRc1 in M17 is discussed in detail. The spectrum has the same TA* as the lower transitions but, with a halfwidth of 12.6 km s-1, it is broader. The CO data are explained by a model for the surroundings of IRc1. In this model the gas density peaks towards IRc1, but the heating is dominated by the H II region of M17. Only turbulent and no systematic motions are present.

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