Effective temperatures and lithium abundances of halo turnoff stars

Bibcode
2005IAUS..228..101N
DOI
10.1017/S1743921305005351
Nissen, P. E.; Akerman, C.; Asplund, M.; Fabbian, D.; Pettini, M.
Bibliographical reference

From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution, IAU Symposium Proceedings of the international Astronomical Union 228, Held in Paris, France, May 23-27, 2005. edited by Hill, V.; François, P.; Primas, F. Cambridge: Cambridge University Press, 2005., pp.101-102

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0
2005
Number of authors
5
IAC number of authors
0
Citations
3
Refereed citations
2
Description
Effective temperatures of 30 turnoff stars with -3.2 {[Fe/H]{ have been derived from the profiles of Balmer lines in high S/N, VLT/UVES spectra. While the systematic error of Teff may be of the order of 100K, the differential values of Teff are determined with a one-sigma precision of ˜25K. These precise Teff values are used in a study of the slope and dispersion of the Li abundance as a function of [Fe/H]. A small, but significant cosmic dispersion in A(Li) appears to be present exemplified by the two very metal-poor stars G64-12 and G64-37.
Type
Non-refereed

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