Lithium in the barium stars

Details Lithium in the barium stars Lithium in the barium stars

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..239p&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, March 1984, p. 239-246.

Astronomy and Astrophysics

Astronomy

21

Abundance, Lithium, Peculiar Stars, Red Giant Stars, Stellar Evolution, K Stars, Stellar Spectra

Scientific paper

New high-resolution spectra of the lithium resonance doublet have provided lithium abundances or upper limits for 26 classical and mild barium stars. The lithium lines always are present in the classical barium stars. Lithium abundances in these stars obey a trend with stellar masses consistent with that previously derived for ordinary K giants. This supports the notion that classical barium stars are post-core-He-flash or core-He-burning stars. Lithium contents in the mild barium stars, however, often are much smaller than those of the classical barium stars; sometimes only upper limits may be determined. The cause for this difference is not easily understood, but may be related to more extensive mass loss by the mild barium stars.

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