Lithium in the barium stars

Details Lithium in the barium stars Lithium in the barium stars

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..568l&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 688, p. 568-573.

Astronomy and Astrophysics

Astronomy

46

Absorption Spectra, Barium, Giant Stars, Lithium, Metallic Stars, Metallicity, Stellar Spectra, Abundance, Cyanogen, Stellar Composition

Scientific paper

Analysis of high-resolution spectra of classical barium giants reveals that an unidentified line is a major contributor to the stellar-absorption feature at 6707.8 A attributed previously to a blend of CN lines and the Li I resonance doublet. The strength of the unidentified line is well correlated with the strength of a Ce II line. In contrast to published reports of positive identifications of absorption due to the Li I doublet, an acceptable fit of a synthetic spectrum to the observed spectrum of a barium giant is obtainable without a significant contribution from the Li I doublet. Upper limits to the Li abundance of classical barium giants are now consistent with those expeeted if CH subgiants evolve into barium giants.

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