The detection of interstellar methyldiacetylene (CH3C4H)

Details The detection of interstellar methyldiacetylene (CH3C4H) The detection of interstellar methyldiacetylene (CH3C4H)

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282l..89m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 282, July 15, 1984, p. L89-L92.

Astronomy and Astrophysics

Astrophysics

23

Acetylene, Interstellar Matter, Methyl Compounds, Molecular Clouds, Abundance, Carbon, Cyano Compounds, Molecular Chains, Molecular Rotation, Radial Velocity

Scientific paper

The CH3C4H interstellar molecule has been detected in the molecular cloud TMC-1, with a total column density lying in the range of 2.0 x 10 to the 13th/sq cm to 3.1 x 10 to the 13th/sq cm for 4-6 K rotational temperatures. By comparison with CH3C2H, the chemical process through which two carbon atoms are added to the chain to produce CH3C4H yields an abundance decrease of a factor of 2-4, as in the case for linear cyanopolyynes. Since this relative abundance factor of approximately 3 is common to several different types of carbon chain molecules, it is suggested to reflect the relative abundance of pure carbon chains of different lengths.

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