Open AccessLithium in Large Magellanic Cloud carbon stars
Author(s) -
Hatzidimitriou D.,
Morgan D. H.,
Can R. D.,
Croke B. F. W.
Publication year - 2003
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2003.06502.x
Subject(s) - physics , stars , carbon star , astrophysics , large magellanic cloud , carbon fibers , lithium (medication) , galaxy , k type main sequence star , astronomy , t tauri star , materials science , medicine , composite number , composite material , endocrinology
ABSTRACT 19 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 the J type, i.e. they show strong 13 C 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.