High-resolution CO observations of weak G-band stars

Details High-resolution CO observations of weak G-band stars High-resolution CO observations of weak G-band stars

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96...38s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, Jan. 1984, p. 38-43.

Astronomy and Astrophysics

Astronomy

8

Abundance, Carbon Isotopes, Cosmochemistry, Giant Stars, Stellar Spectra, Carbon Monoxide, High Resolution

Scientific paper

High-resolution spectra of the 2 μ first-overtone CO bands in the weak G-band giants HR 6766 and 37 Com have been obtained. Synthetic spectra have been computed to obtain carbon abundances and carbon isotope ratios. There is excellent agreement between the carbon abundances derived from these CO data and those determined using features of the CH G-band. Therefore no large enrichment of helium in these stellar envelopes is likely. The 13CO features in 37 Com are strong; a carbon isotope ratio as low as 2 is indicated for this star.

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