C3H2 observations in dense dark clouds

Details C3H2 observations in dense dark clouds C3H2 observations in dense dark clouds

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...209..382c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 209, no. 1-2, Jan. 1989, p. 382-390.

Statistics

Computation

41

Cyclic Hydrocarbons, Interstellar Chemistry, Interstellar Matter, Molecular Clouds, Ortho Para Conversion, Computational Astrophysics, Dark Matter, Taurus Constellation

Scientific paper

The detection of the hydrocarbon ring molecule cyclopropenylidene C3H2 in 29 dark cloud sources in the Taurus Molecular Complex is reported. Ortho and para transitions at 18.3 and 21.6 GHz have been observed and for some of these sources the ortho transition at 85.3 GHz. For the sources observed at 18.3 and 85.3 GHz, statistical equilibrium calculations make it possible to derive the C3H2 column densities and molecualr hydrogen density. The fractional abundance of C3H2 in dark clouds is consistent with chemical models including very large molecules.

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