C6H - Astronomical study of its fine and hyperfine structure

Details C6H - Astronomical study of its fine and hyperfine structure C6H - Astronomical study of its fine and hyperfine structure

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...181l...1c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 181, no. 1, July 1987, p. L1-L4.

Astronomy and Astrophysics

Astrophysics

52

Astronomical Spectroscopy, Fine Structure, Free Radicals, Hydrocarbons, Hyperfine Structure, Radio Spectra, Interstellar Matter, Line Spectra, Molecular Spectra, Stellar Envelopes

Scientific paper

The authors report the detection of the 2II1/2 fine structure state of C6H the new radical discovered by Guélin et al. (1986, 1987) and Suzuki et al. (1986), as well as further observations of its 2II3/2 state. The new data, which consist of 50 lines, allows the accurate determination of the radical's rotation and distortion constants as well as its main fine and hyperfine parameters. The authors estimate the C6H column density to be 3×1014cm-2 in IRC +10216 and 1013cm-2 in TMC1. The C6H/C5H abundance ratios are 2 and 3, respectively, in these two sources.

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