HCO(+), H(C-13)N, and H(C-12)N aperture synthesis observations of the circumnuclear ring in the Galactic center

Details HCO(+), H(C-13)N, and H(C-12)N aperture synthesis observations of the circumnuclear ring in the Galactic center HCO(+), H(C-13)N, and H(C-12)N aperture synthesis observations of the circumnuclear ring in the Galactic center

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...411..667m&link_type=abstract

Astrophysical Journal - Part 1 (ISSN 0004-637X), vol. 411, no. 2, p. 667-673.

Astronomy and Astrophysics

Astrophysics

22

Formyl Ions, Galactic Nuclei, Hydrocyanic Acid, Interstellar Chemistry, Interstellar Matter, Molecular Clouds, Carbon 13, Gas Temperature, Interstellar Gas, Radio Observation, Spatial Resolution

Scientific paper

The present 1988 and 1990 observations of the Sgr A West J = 1-0 transition lines of H(C-13)N and HCO(+), as well as a remapping of H(C-12)N J = 1-0 spectral line data, show that the clumps in the Galactic center's ring have an HCO(+)/HCN abundance that is 5-15 times lower than that which is measured in interstellar, quiescent molecular clouds. The HCN/H2 abundance ratio is also unusually large.

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