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The metal–poor end of the Spite plateau: gravity sensitivity of the Hα wings fitting.
Published online by Cambridge University Press: 23 April 2010
Abstract
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 Hα wings fitting, and on its sensitivity to the chosen stellar gravity.
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- Contributed Papers
- Information
- Proceedings of the International Astronomical Union , Volume 5 , Symposium S268: Light Elements in the Universe , November 2009 , pp. 355 - 356
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- Copyright © International Astronomical Union 2010