CO observations in NGC 604. I - Physical properties

Details CO observations in NGC 604. I - Physical properties CO observations in NGC 604. I - Physical properties

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...265..437v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 265, no. 2, p. 437-446.

Astronomy and Astrophysics

Astrophysics

15

Carbon Monoxide, H Ii Regions, Interstellar Gas, Diffuse Radiation, Emission Spectra, Interferometry, Molecular Clouds

Scientific paper

A field of one arcmin diameter on the eastern edge of the H II region NGC 604 has been mapped in the J = 2-1 and J = 1-0 transitions of the (C-12)O molecule. The distribution of the CO emission, which is observed all over that field, is characterized by two prominent concentrations plus a diffuse component with complex kinematics. The (C-13)O molecule in the (2-1) and the (1-0) transitions has also been observed. From these observations, the physical conditions of these concentrations are derived. Although NGC 604 is known to be deficient in heavy elements as compared to the metallicity in the solar neighborhood, the CO luminosity to virial mass ratio is typical of those for giant molecular clouds in our Galaxy.

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