Bibcode
Nissen, P. E.; Akerman, C.; Asplund, M.; Fabbian, D.; Pettini, M.
Referencia bibliográfica
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
Fecha de publicación:
0
2005
Número de citas
3
Número de citas referidas
2
Descripción
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.