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

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

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...262..248w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 262, no. 1, p. 248-250.

Astronomy and Astrophysics

Astrophysics

13

Carbon Monoxide, Carbon 12, Carbon 13, Interstellar Matter, Isotopic Enrichment, Ophiuchi Clouds, Abundance, Chemical Evolution, Emission Spectra

Scientific paper

A tentative detection of the J = 1 - 0 emission line of (C-13)O has been obtained with SEST from a 24.4 hour integration. The velocity resolution used was 0.23 km/s and the FWHP beamwidth was 45 arcsec. If the (C-13)O line data are conservatively interpreted as an upper limit, the (C-12)O/(C-13)O ratio is not less than 60. Our result supports the previous determination of a large value of the isotope ratio in this cloud, made using radio emission lines with a 1.6-arcmin beam, and extends the ratio based on emission lines to a smaller region. When interpreted as a lower limit, our data is consistent with the ratio obtained from UV absorption line data for (C-12)O and (C-13)O.

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