Discovery of interstellar acetylene

Journal Article · Sat Jul 01 04:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185480· OSTI ID:5595078

Lacy, J H; Evans, II, N J; Achtermann, J M; Bruce, D E; Arens, J F ^[1]

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1. Texas Univ., Austin (USA)

Absorption by interstellar acetylene (C2H2) has been detected in the spectra of three IR sources embedded in molecular clouds. One or more lines in the 13.7 micron nu5 vibration-rotation band were detected toward GL 2591, W3 IRS 5, and OMC-1 IRc2. The observations require C{sub 2}H{sub 2} abundances of about 0.0003 to 0.003 of CO. Such abundances can be explained by models in which the molecular clouds are chemically unevolved or in which gas phase abundances have been enhanced by recent evaporation of grain mantles. 17 refs.

• OSTI ID: 5595078
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 342; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ABUNDANCE
ACETYLENE
ALKYNES
CHEMICAL COMPOSITION
CHEMISTRY
COSMIC GASES
COSMOCHEMISTRY
EMISSION SPECTRA
FLUIDS
GASES
HYDROCARBONS
INFRARED SPECTRA
INTERSTELLAR SPACE
MOLECULES
ORGANIC COMPOUNDS
SPACE
SPECTRA