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Title:
HCO(+), H(C-13)N, and H(C-12)N aperture synthesis observations of the circumnuclear ring in the Galactic center
Authors:
Marr, J. M.; Wright, M. C. H.; Backer, D. C.
Affiliation:
AA(Haverford College, PA), AB(California Univ., Berkeley), AC(California Univ., Berkeley)
Publication:
Astrophysical Journal - Part 1 (ISSN 0004-637X), vol. 411, no. 2, p. 667-673. (ApJ Homepage)
Publication Date:
07/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Formyl Ions, Galactic Nuclei, Hydrocyanic Acid, Interstellar Chemistry, Interstellar Matter, Molecular Clouds, Carbon 13, Gas Temperature, Interstellar Gas, Radio Observation, Spatial Resolution
DOI:
10.1086/172869
Bibliographic Code:
1993ApJ...411..667M

Abstract

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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