Lithium in field Am and normal A-F-type stars
Astrophysics
2009-11-11 v1
Abstract
Preliminary abundances of lithium and a few other elements have been obtained for 31 field Am stars with good Hipparcos parallaxes, as well as for 36 normal A and F stars. Radial and projected rotational velocities were determined as well. We examine the Li abundance as a function of the stellar parameters: for normal stars, it is clearly bimodal for Teff < 7500 K, while Am-Fm stars are all somewhat Li-deficient in this range. The most Li-deficient stars - either Am or normal - tend to be at least slightly evolved, but the reverse is not true.
Cite
@article{arxiv.astro-ph/0511836,
title = {Lithium in field Am and normal A-F-type stars},
author = {P. North and F. Betrix and C. Besson},
journal= {arXiv preprint arXiv:astro-ph/0511836},
year = {2009}
}
Comments
4 pages, 2 figures, poster presented at the conference "Element stratification in stars, 40 years of atomic diffusion", eds. G. Alecian, O. Richard and S. Vauclair, EAS Publication Series, in press