Observations of CO/J = 2-1/ emission from molecular clouds

Details Observations of CO/J = 2-1/ emission from molecular clouds Observations of CO/J = 2-1/ emission from molecular clouds

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...231..720p&link_type=abstract

Astrophysical Journal, Part 1, vol. 231, Aug. 1, 1979, p. 720-731.

Astronomy and Astrophysics

Astrophysics

72

Carbon Monoxide, Interstellar Matter, Line Spectra, Molecular Gases, Nebulae, Abundance, Carbon Isotopes, Emission Spectra, Graphs (Charts), Milky Way Galaxy, Millimeter Waves, Opacity, Optical Thickness, Orion Nebula

Scientific paper

Spectra and strip maps of CO(J = 2-1) emission are presented for a variety of molecular clouds within the Galaxy. In most cases data are also presented for the less-abundant species (C-13)O and C(O-18), and, where possible, comparison is made between the CO(2-1) data and equivalent CO(1-0) spectra and maps. A discussion is given of the behavior of line widths and spatial extents as a function of CO line opacity. From the line widths it is deduced that for some dense molecular clouds the CO(1-0) optical depth is in the range 20-100.

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