Radio observations of interstellar CN toward diffuse clouds, dark clouds, black clouds, and circumstellar clouds

Details Radio observations of interstellar CN toward diffuse clouds, dark clouds, black clouds, and circumstellar clouds Radio observations of interstellar CN toward diffuse clouds, dark clouds, black clouds, and circumstellar clouds

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...225..843a&link_type=abstract

Astrophysical Journal, Part 1, vol. 225, Nov. 1, 1978, p. 843-856.

Other

47

Abundance, Astronomical Spectroscopy, Cn Emission, Interstellar Chemistry, Microwave Emission, Nebulae, Emission Spectra, Gas Density, Interstellar Matter, Line Spectra, Stellar Envelopes, Tables (Data)

Scientific paper

Emission at 113 GHz from the CN molecule has been searched for in a large number of interstellar regions, primarily dark dust clouds. Lines have been detected in four dark clouds, the first time CN has been observed in this type of object. Comparative CO observations were also performed. The CN/CO abundance ratio varies from cloud to cloud, even among objects which are apparently otherwise similar. This variation suggests that the chemistry of dark clouds may be time-dependent. A previously reported detection of CN emission from a diffuse cloud was not confirmed. Several black clouds and circumstellar clouds were reobserved to obtain better line parameters and to serve as comparative interstellar chemical systems.

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