Abundances and Kinematics of Field Halo and Disk Stars I: Observational Data and Abundance Analysis

Details Abundances and Kinematics of Field Halo and Disk Stars I: Observational Data and Abundance Analysis Abundances and Kinematics of Field Halo and Disk Stars I: Observational Data and Abundance Analysis

2000-06-19

arxiv.org/abs/astro-ph/0006260v1

Astronomy and Astrophysics

Astrophysics

41 pages, 7 Postscript figures. Accepted for publication in the AJ

Scientific paper

10.1086/301548

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.

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