Lithium in LMC carbon stars
Abstract
Nineteen carbon stars that show lithium enrichment in their atmospheres have been discovered among a sample of 674 carbon stars in the Large Magellanic Cloud. Six of the Li-rich carbon stars are of J-type, i.e. with strong 13C isotopic features. No super-Li-rich carbon stars were found. The incidence of lithium enrichment among carbon stars in the LMC is much rarer than in the Galaxy, and about five times more frequent among J-type than among N-type carbon stars. The bolometric magnitudes of the Li-rich carbon stars range between -3.3 and -5.7. Existing models of Li-enrichment via the hot bottom burning process fail to account for all of the observed properties of the Li-enriched stars studied here.
Keywords
Cite
@article{arxiv.astro-ph/0304297,
title = {Lithium in LMC carbon stars},
author = {D. Hatzidimitriou and D. H. Morgan and R. D. Cannon and B. F. W. Croke},
journal= {arXiv preprint arXiv:astro-ph/0304297},
year = {2011}
}
Comments
10 pages, 8 figures, Latex; in press, MNRAS