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Title:
The formation of oxygen-containing organic molecules in the Orion compact ridge
Authors:
Millar, T. J.; Herbst, Eric; Charnley, S. B.
Affiliation:
AA(University of Manchester Institute of Science and Technology, England), AB(Duke University, Durham, NC), AC(NASA, Ames Research Center, Moffett Field, CA; Max-Planck-Institut für Physik und Astrophysik, Garching bei München, Germany; Rensselaer Polytechnic Institute, Troy, NY)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 369, March 1, 1991, p. 147-156. Research supported by SERC. (ApJ Homepage)
Publication Date:
03/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Interstellar Gas, Molecular Clouds, Organic Compounds, Orion Constellation, Oxygen Compounds, Star Formation, Chemical Evolution, Methyl Alcohol, Vapor Phases
DOI:
10.1086/169745
Bibliographic Code:
1991ApJ...369..147M

Abstract

Following a suggestion of Blake et al. (1987), an attempt was made to account for the unusually large abundances of selected oxygen-containing organic molecules in the so-called 'compact ridge' source directed toward Orion KL by a gas-phase chemical model in which large amounts of water are injected into the source from the IRc2 outflow. Although quantitative model results show that the calculated abundances of methanol, methyl formate, and dimethyl ether can be enhanced relative to their values in the absence of water injection, the enhancements fall far short of explaining the very large observed abundances of these species. Models in which methanol is injected rather than water are more successful, although the source of the methanol is unclear.

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