Cyanoacetylene in the SGR A molecular clouds

Details Cyanoacetylene in the SGR A molecular clouds Cyanoacetylene in the SGR A molecular clouds

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...155..129w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 155, no. 1, Jan. 1986, p. 129-136.

Astronomy and Astrophysics

Astrophysics

21

Acetylene, Cyano Compounds, Galactic Evolution, Gas Density, Molecular Clouds, Formaldehyde, Hydrogen, Line Spectra, Statistical Analysis

Scientific paper

A statistical equilibrium model is used to analyze cyanoacetylene transitions in the Sgr A molecular clouds, in order to derive their H2 density. For the case of a homogeneous model with an assumed temperature of 80 K, a density of 1000/cu cm is obtained for the 20 and 50 km/sec clouds. A better fit to the data is obtainable in a model where 20 percent of the mass is in the form of high density (10,000/cu cm) clumps. These results suggest that the Sgr A molecular clouds, if stable against tidal disruption, are at least 75 pc from the galactic nucleus and do not directly interact with the region surrounding Sgr A West.

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