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

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

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010iaus..268..355s&link_type=abstract

Light Elements in the Universe, Proceedings of the International Astronomical Union, IAU Symposium, Volume 268, p. 355-356

Astronomy and Astrophysics

Astronomy

Nuclear Reactions, Nucleosynthesis – Galaxy: Halo – Stars: Abundances, Population Ii

Scientific paper

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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