The lithium abundances of the Capella giants

Details The lithium abundances of the Capella giants The lithium abundances of the Capella giants

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103.1668p&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 103, no. 5, May 1992, p. 1668-1672.

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20

Binary Stars, G Stars, Giant Stars, Lithium, Metallicity, Abundance, Spectral Line Width, Stellar Evolution, Stellar Spectrophotometry

Scientific paper

The abundance of lithium in each of the two giants which comprise the spectroscopic binary star Capella has been redetermined using digital, electronic spectra and modern analytical techniques. The abundance of lithium in the warm (G0) secondary star is log Li = 3.0, consistent with the value seen in young, unevolved stars and the interstellar medium. The abundance of lithium in the cooler (G8) primary star is log Li = 0.8, similar to what is found in other red giants of similar spectral type. The lithium abundance in the primary star is less than would be expected from classical predictions. Possible explanations for the low lithium abundance are considered. The lithium abundance in the primary and its similarity to the Hyades giants support the conclusion that the primary is a 'clump' giant.

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