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Title:
A study of interstellar carbonyl sulfide
Authors:
Goldsmith, P. F.; Linke, R. A.
Affiliation:
AA(Five College Radio Astronomy Observatory, Amherst, Mass.), AB(Bell Telephone Laboratories, Inc., Holmdel, N.J.)
Publication:
Astrophysical Journal, Part 1, vol. 245, Apr. 15, 1981, p. 482-494. (ApJ Homepage)
Publication Date:
04/1981
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Abundance, Carbonyl Compounds, Interstellar Gas, Molecular Clouds, Stellar Envelopes, Sulfides, Electron Transitions, Gas Density, Isotopes, Line Spectra, Microwave Spectra, Molecular Excitation, Molecular Spectra, Spectrum Analysis
DOI:
10.1086/158824
Bibliographic Code:
1981ApJ...245..482G

Abstract

The OCS molecule has been studied in 24 interstellar and circumstellar molecular clouds and detected in a total of 10 sources and seven different transitions. Analysis of the data using hydrogen densities derived from a study of CS and assuming that the OCS lines are optically thin, yields a mean column density of 3 x 10 to the 14th per sq cm in 10 interstellar clouds, while the average fractional abundance of N(OCS)/N(H2) = 1.6 x 10 to the -9th. The results of maps and analyses of multiple transitions in several sources suggest that the regions responsible for the OCS emission are only marginally resolved with a beamsize of about 2 arcmin.

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