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Title:
Observations of interstellar HOCO(+): Abundance enhancements toward the Galactic center
Authors:
Minh, Y. C.; Irvine, W. M.; Ziurys, L. M.
Affiliation:
AA(Five College Radio Astronomy Observatory; Massachusetts, University, Amherst), AB(Five College Radio Astronomy Observatory; Massachusetts, University, Amherst), AC(Five College Radio Astronomy Observatory; Massachusetts, University, Amherst)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 1, 1988, p. 175-181. (ApJ Homepage)
Publication Date:
11/1988
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Galactic Nuclei, Hydrocarbons, Interstellar Matter, Molecular Clouds, Carbon Dioxide, Emission Spectra, Interstellar Chemistry
DOI:
10.1086/166827
Bibliographic Code:
1988ApJ...334..175M

Abstract

A survey of the 404-303 and 101-000 transitions of HOCO+ has been made toward several molecular clouds. The HOCO+ molecule was not observed in any sources except Sgr B2 and Sgr A. The 505- 404 and 414- 313 transitions were also detected toward Sgr B2. The results indicate that gas phase CO2 is not a major carbon reservoir in typical molecular clouds. The column density of HOCO+ at the emission peak in Sgr B2 is ≡3×1014cm-2, and the fractional abundance relative to H2 >= 3×10-10.

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