2000/06/19 by Jon P. Fulbright · 2 citations
Physics and Astronomy · #astro-ph
paper · pdf · doi:10.1086/301548
41 pages, 7 Postscript figures. Accepted for publication in the AJ
arxiv created 2000/06/19 · arxiv updated 2009/12/01
We describe observations and abundance analysis of a high-resolution, high-S/N survey of 168 stars, most of which are metal-poor dwarfs. We follow a self-consistent LTE analysis technique to determine the stellar parameters and abundances, and estimate the effects of random and systematic uncertainties on the resulting abundances. Element-to-iron ratios are derived for key alpha, odd, Fe-peak, r- and s-process elements. Effects of Non-LTE on the analysis of Fe I lines are shown to be very small on the average. Spectroscopically determined surface gravities are derived that are generally close to those obtained from Hipparcos parallaxes.