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Communication Dans Un Congrès Année : 2010

The metal-poor end of the Spite plateau: gravity sensitivity of the Halpha wings fitting.

Résumé

We recently presented (Sbordone et al., 2009a) the largest sample to date of lithium abundances in extremely metal-poor (EMP) Halo dwarf and Turn-Off (TO) stars. One of the most crucial aspects in estimating Li abundances is the Teff determination, since the Li I 670.8 nm doublet is highly temperature sensitive. In this short contribution we concentrate on the Teff determination based on Halpha wings fitting, and on its sensitivity to the chosen stellar gravity.

Dates et versions

hal-03734074 , version 1 (21-07-2022)

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Luca Sbordone, Piercarlo Bonifacio, Elisabetta Caffau, Hans-Günter Ludwig, Natalie Behara, et al.. The metal-poor end of the Spite plateau: gravity sensitivity of the Halpha wings fitting.. Light Elements in the Universe, IAU Symposium 268, Nov 2009, Geneva, Switzerland, Switzerland. pp.355-356, ⟨10.1017/S1743921310004448⟩. ⟨hal-03734074⟩
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