Carbon monoxide in a CH star in M22

Details Carbon monoxide in a CH star in M22 Carbon monoxide in a CH star in M22

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pasp...92...75r&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 92, Feb.-Mar. 1980, p. 75-78.

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Carbon Monoxide, Carbon Stars, Globular Clusters, Infrared Spectra, Abundance, Molecular Absorption, Nuclear Fusion, Stellar Temperature

Scientific paper

Spectra from 2.1-2.5 microns and broad-band observations from 1.2-3.5 microns are presented for the CH star III-106 in the globular cluster M22. The visual to infrared color implies an effective temperature of about 4600 K. The CO index is 0.11, significantly greater than for other cluster giants of this temperature and metallicity. The strength of the CO can be understood if the carbon abundance in III-106 has been enriched by nucleosynthesis. A carbon enhancement of at least a factor of 4 appears to be required.

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