Astronomical detection of H2CCC

Details Astronomical detection of H2CCC Astronomical detection of H2CCC

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...368l..39c&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 368, Feb. 20, 1991, p. L39-L41.

Astronomy and Astrophysics

Astronomy

59

Astronomical Spectroscopy, Cyclic Compounds, Interstellar Matter, Line Spectra, Radio Sources (Astronomy), Rotational Spectra, Carbon, Isomers, Molecular Structure, Recombination Reactions

Scientific paper

H2CCC, an isomer of the widely distributed interstellar ring C3H2, has been detected in TMC-1 and possibly IRC + 10216 with the IRAM 30 m telescope, following a recent laboratory determination of the rotational spectrum of this new type of highly polar carbon chain. The rotational temperature of H2CCC in TMC-1, like that of other highly polar molecules in this source, is very low: 4-6 K; the column density is also fairly low: (2.5 + or - 0.5) x 10 to the 12th/sq cm, slightly more than 1 percent that of the cyclic isomer.

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