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The metal-poor end of the Spite plateau: gravity sensitivity of the Halpha wings fitting.
Acte de colloque   Open Access

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

Luca Sbordone, Piercarlo Bonifacio, Elisabetta Caffau, Hans-Günter Ludwig, Natalie Behara, J. I. Gonzalez-Hernandez, Matthias Steffen, Roger Cayrel, Bernd Freytag, C. Van'T Veer, …
IAU Symposium, Vol.268, pp.355-356
Light Elements in the Universe, IAU Symposium 268 (Geneva, Switzerland, Switzerland, 09/11/2009–13/11/2009)
2010
DOI: https://doi.org/10.1017/S1743921310004448

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.

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