The metal-poor end of the Spite plateau: gravity sensitivity of the H[alpha] wings fitting

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 temperatu...

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Published inProceedings of the International Astronomical Union Vol. 5; no. S268; p. 355
Main Authors Sbordone, L, Bonifacio, P, Caffau, E, Ludwig, H-G, Behara, N, Gonzalez-Hernandez, J I, Steffen, M, Cayrel, R, Freytag, B, Van't Veer, C, Molaro, P, Plez, B, Sivarani, T, Spite, M, Spite, F, Beers, T C, Christlieb, N, François, P, Hill, V
Format Journal Article
LanguageEnglish
Published Cambridge Cambridge University Press 01.11.2009
Subjects
Astronomy
Astrophysics
Chemical elements
Nuclear physics
Stars & galaxies
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Summary: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 H[alpha] wings fitting, and on its sensitivity to the chosen stellar gravity. [PUBLICATION ABSTRACT]
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921310004448