Interstellar C-12/C-13 ratio revisited

Details Interstellar C-12/C-13 ratio revisited Interstellar C-12/C-13 ratio revisited

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...378..181c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 378, Sept. 1, 1991, p. 181-185.

Astronomy and Astrophysics

Astronomy

47

Carbon 12, Carbon 13, Interstellar Matter, Molecular Ions, Molecular Spectra, Seeing (Astronomy), Telescopes

Scientific paper

Recent 107-in telescope observations of the molecular ion CH(+) at 4232 A in the direction of Zeta Oph are reported. One-dimensional spectra were extracted from the frames using procedures in IRAF. A Gaussian line profile was fitted to the data at random points well separated from the CH(+) features. The resulting distribution of equivalent widths is presented. Results for the individual spectra are summarized as well as the errors assigned to the individual results. Histograms of the equivalent widths for the CH-12(+) and CH-13(+) lines are shown and compared to the data from Stahl at al. (1989), and good agreement is found. It is concluded that the C-12/C-13 ratio toward Zeta Oph is closer to 70 than to 45, as argued by Hawkins et al. (1985).

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