Modeling lithium rich carbon stars in the Large Magellanic Cloud: an independent distance indicator ?
P. Ventura, F. D'Antona, I. Mazzitelli
Abstract
We present the first quantitative results explaining the presence in the Large Magellanic Cloud of some asymptotic giant branch stars that share the properties of lithium rich carbon stars. A self-consistent description of time-dependent mixing, overshooting, and nuclear burning was required. We identify a narrow range of masses and luminosities for this peculiar stars. Comparison of these models with the luminosities of the few Li-rich C stars in the Large Magellanic Cloud provides an independent distance indicator for the LMC
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