The carbon abundance in the atmospheres of single and binary stars

Details The carbon abundance in the atmospheres of single and binary stars The carbon abundance in the atmospheres of single and binary stars

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65..571l&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, May-June 1988, p. 571-581. In Russian.

Astronomy and Astrophysics

Astronomy

5

Abundance, Carbon Stars, Stellar Atmospheres, Stellar Composition, Atmospheric Models, Binary Stars, High Dispersion Spectrographs, Hydrogen, Line Spectra

Scientific paper

The carbon abundance in the atmospheres of single stars and the brighter components of binary stars are determined on the basis of high-dispersion W(lambda) data, using the LTE atmospheric model for C II lines and the non-LTE model for C III lines. The mean value of lg N (C) for 38 single stars was found to be 8.5 + or - 0.3. For 48 binary stars, the mean value was 8.3 + or - 0.3. The lesser carbon abundance in the atmospheres of binary stars may be explained by a more intense transfer of matter from hydrogen burning regions to the atmosphere in the CNO-cycle compared to normal single stars.

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