Detection of C-13 isotopomers of HC5N (J = 9-8) in the circumstellar envelope of IRC + 10216

Details Detection of C-13 isotopomers of HC5N (J = 9-8) in the circumstellar envelope of IRC + 10216 Detection of C-13 isotopomers of HC5N (J = 9-8) in the circumstellar envelope of IRC + 10216

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...367l..33b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 367, Jan. 20, 1991, p. L33-L36.

Astronomy and Astrophysics

Astronomy

9

Carbon 13, Late Stars, Stellar Composition, Stellar Envelopes, Stellar Mass Ejection, Astronomical Spectroscopy, Carbon Stars, Carbon 12, Radio Sources (Astronomy)

Scientific paper

The detection of HCC-13CCCN, HCCC-13CCN, and HCCCC-13CN (J = 9-8) is reported in the molecular envelope of the carbon star IRC + 10216. By comparing reliable values for the C-13/C-12 isotopic ratio in IRC + 10216 with the present results, it is concluded that HC-(12)5N is probably optically thick, which in turn suggests that the gas distribution must be quite clumpy, or at least highly inhomogeneous, with a volume filling factor of about 0.1 percent to a few percent.

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