Search for interstellar methane

Details Search for interstellar methane Search for interstellar methane

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...298l..67k&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 298, Nov. 15, 1985, p. L67-L69.

Astronomy and Astrophysics

Astrophysics

19

Abundance, Interstellar Matter, Methane, Molecular Clouds, Orion Nebula, Infrared Spectra, Molecular Spectra

Scientific paper

Upper limits of the column abundance of methane have been determined for the Orion molecular cloud in front of the BN object and for the cloud obscuring AFGL 490. Observations of the P(2) line of the ν3 fundamental of CH4 at 3.3 μm give a column density of N < 6×1016cm-2 to BN. The resulting abundance ratio, (CH4)/(CO) < 1×10-2, is consistent with current chemical models of molecular clouds, and confirms that little interstellar carbon is contained in CH4.

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