The (C-12)H(+)/(C-13)H(+) ratio toward Zeta Ophiuchi

Details The (C-12)H(+)/(C-13)H(+) ratio toward Zeta Ophiuchi The (C-12)H(+)/(C-13)H(+) ratio toward Zeta Ophiuchi

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...221..321s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 221, no. 2, Sept. 1989, p. 321-325.

Astronomy and Astrophysics

Astrophysics

41

Astronomical Spectroscopy, Carbon Compounds, Milky Way Galaxy, Molecular Ions, Ophiuchi Clouds, Abundance, Galactic Evolution, Interstellar Matter, Signal To Noise Ratios, Spectral Line Width

Scientific paper

Observations of the interstellar CH(+) line at 4232 A toward Zeta Oph were carried out to determine the C-12/C-13 ratio in the Zeta Oph cloud. Values obtained for the equivalent widths of the (C-12)H(+) and (C-13)H(+) line together with the (C-12)H(+)/(C-13)H(+) ratio inferred from these data are compared with earlier data. Good agreement is found with Vanden Bout (1972) and Vanden Bout and Snell (1980) but not with Bortolot and Thaddeus (1969) and Hawkins et al. (1985). Explanations for discrepancies are provided. The results suggest that the (C-12)/(C-13) ratio has not changed very much over the past 4.6 Gyr.

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