Lithium Abundance of Halo Dwarfs Revised

Details Lithium Abundance of Halo Dwarfs Revised Lithium Abundance of Halo Dwarfs Revised

1995-03-21

arxiv.org/abs/astro-ph/9503081v1

Astronomy and Astrophysics

Astrophysics

4 pages, LaTeX A&A(1990) style, uses psfig to paste five Postscript figures separately available, (gzipped, uuencoded)

Scientific paper

Lithium abundances in a sample of halo dwarfs have been redetermined by using the new T$_{eff}$ derived by Fuhrmann et al (1994) from modelling of the Balmer lines. These T$_{eff}$ are reddening independent, homogeneous and of higher quality than those based on broad band photometry. Abundances have been derived by generating new atmospheric models by using the ATLAS-9 code by Kurucz (1993) with enhanced $\alpha$-elements and without the overshooting option. The revised abundances show a remarkably flat {\it plateau} in the Li-T$_{eff}$ plane for T$_{eff}$$>$ 5700 K with no evidence of trend with T$_{eff}$ or falloff at the hottest edge. Li abundances are not correlated with metallicity for [Fe/H]$<$ -1.4 in contrast with Thorburn (1994). All the determinations are consistent with the same pristine lithium abundance and the errors estimated for individual stars fully account for the observed dispersion. The weighted average Li value for the 24 stars of the plateau with T$_{eff}$$> $ 5700 K and [Fe/H]$\le$ -1.4, is [Li] = 2.210 $\pm$ 0.013, or 2.224 when non-LTE corrections by Carlsson et al (1994) are considered.

Affiliated with

Also associated with

No associations

Rating

Lithium Abundance of Halo Dwarfs Revised does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Lithium Abundance of Halo Dwarfs Revised, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lithium Abundance of Halo Dwarfs Revised will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-347127