Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...368l..43c&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 368, Feb. 20, 1991, p. L43-L45.
Astronomy and Astrophysics
Astronomy
37
Astronomical Spectroscopy, Carbenes, Interstellar Matter, Line Spectra, Molecular Structure, Radio Sources (Astronomy), Isomers, Rotational Spectra, Telescopes
Scientific paper
The carbon-chain carbene H2CCCC, a highly polar isomer of diacetylene recently identified in the laboratory, has been detected in the circumstellar shell of IRC + 10216 with the IRAM 30 m telescope. Eight transitions between 80 and 135 GHz have been assigned, all but two of the ortho symmetry species. The rotational temperature of H2CCCC in IRC + 10216 is 20 + or - 3 K, and the column density averaged over the about 25 arcsec beam of the 30 m telescope at 3 mm is (1.6 + or - 0.4) x 10 to the 13th/sq cm - 6 times that of H2CCC, the first member of this sequence of cumulene carbenes, also recently identified in TMC-1.
Cernicharo Jose
Gottlieb Carl A.
Guélin Michel
Killian Thomas C.
Thaddeus Patrick
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