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Title: Molecular abundances in OMC-1 - the chemical composition of interstellar molecular clouds and the influence of massive star formation

Abstract

The chemical composition of the various regions in the core of OMC-1 is investigated based on millimeter-wave spectral line survey results. The cool and extended quiescent ridge gas is characterized by fairly simple carbon-rich species whose abundances are similar to those found in other well-studied objects like TMC-1 and Sgr B2. Its chemical composition is reasonably well predicted by purely gas phase ion-molecule reaction networks. Abundances in the high-velocity plateau are dominated by outflow from IRc 2. The hot core is interpreted as a particularly large and dense clump or clumps of gas left over from the formation of IRc 2. The production of complex oxygen-rich species such as CH3OH in the compact ridge is accomplished by radiation association reactions between smaller molecular ions in the quiescent cloud material and highly abundant neutral species such as HCN and H/sub 2/O supplied by the outflow from IRc 2. 117 references.

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of California, Berkeley, CA (United States); California Institute of Technology (CalTech), Pasadena, CA (United States)
OSTI Identifier:
5966263
Resource Type:
Journal Article
Journal Name:
Astrophys. J.; (United States)
Additional Journal Information:
Journal Volume: 315
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMIC GASES; CHEMICAL COMPOSITION; INTERSTELLAR SPACE; STAR EVOLUTION; ABUNDANCE; EMISSION SPECTRA; LTE; MASS; MOLECULES; NEBULAE; TEMPERATURE DISTRIBUTION; EQUILIBRIUM; FLUIDS; GASES; SPACE; SPECTRA; 640105* - Astrophysics & Cosmology- Galaxies; 640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources

Citation Formats

Blake, G A, Sutton, E C, Masson, C R, and Phillips, T G. Molecular abundances in OMC-1 - the chemical composition of interstellar molecular clouds and the influence of massive star formation. United States: N. p., 1987. Web. doi:10.1086/165165.
Blake, G A, Sutton, E C, Masson, C R, & Phillips, T G. Molecular abundances in OMC-1 - the chemical composition of interstellar molecular clouds and the influence of massive star formation. United States. https://doi.org/10.1086/165165
Blake, G A, Sutton, E C, Masson, C R, and Phillips, T G. 1987. "Molecular abundances in OMC-1 - the chemical composition of interstellar molecular clouds and the influence of massive star formation". United States. https://doi.org/10.1086/165165.
@article{osti_5966263,
title = {Molecular abundances in OMC-1 - the chemical composition of interstellar molecular clouds and the influence of massive star formation},
author = {Blake, G A and Sutton, E C and Masson, C R and Phillips, T G},
abstractNote = {The chemical composition of the various regions in the core of OMC-1 is investigated based on millimeter-wave spectral line survey results. The cool and extended quiescent ridge gas is characterized by fairly simple carbon-rich species whose abundances are similar to those found in other well-studied objects like TMC-1 and Sgr B2. Its chemical composition is reasonably well predicted by purely gas phase ion-molecule reaction networks. Abundances in the high-velocity plateau are dominated by outflow from IRc 2. The hot core is interpreted as a particularly large and dense clump or clumps of gas left over from the formation of IRc 2. The production of complex oxygen-rich species such as CH3OH in the compact ridge is accomplished by radiation association reactions between smaller molecular ions in the quiescent cloud material and highly abundant neutral species such as HCN and H/sub 2/O supplied by the outflow from IRc 2. 117 references.},
doi = {10.1086/165165},
url = {https://www.osti.gov/biblio/5966263}, journal = {Astrophys. J.; (United States)},
number = ,
volume = 315,
place = {United States},
year = {Wed Apr 01 00:00:00 EST 1987},
month = {Wed Apr 01 00:00:00 EST 1987}
}