Observations of C3H2 (2_12 - 1_01) Toward the Sagittarius A Molecular Cloud

Details Observations of C3H2 (2_12 - 1_01) Toward the Sagittarius A Molecular Cloud Observations of C3H2 (2_12 - 1_01) Toward the Sagittarius A Molecular Cloud

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jkas...26...73l&link_type=abstract

Journal of the Korean Astronomical Society, vol. 26, no. 1, p. 73-78

Astronomy and Astrophysics

Astronomy

2

Interstellar Cloud, Interstellar Molecule - Galactic Center

Scientific paper

We have mapped the C3H2 2_12 - 1_01 transition line toward the Sgr A molecular cloud on a 1' grid spacing and derived C3H2 column densities of 3 - 7*10e14/cm2 for molecular clouds of Sgr A. The fractional abundances of C3H2 relative to H2 are obtained to be 3 - 6*10E-9, which are slightly lower than that for the cold dark cloud TMC-1 but are enhanced by factors of 5-60 compared to those for Sgr B2 and the Orion extended ridge. We also estimate from the C3H2 column densities total masses of - 10E6 Mo for two clouds (M - 0.13 - 0.08 and M - 0.02 - 0.07), which are thought to be close to the virial equilibrium. We suggest that the large abundance of C3H2 in Sgr A may be partly due to the activities of the Galactic center.

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