About compiled catalogue of spectroscopic determined chemical abundances for stars with accurate parallaxes. Magnesium

Abstract

We present a compiled catalogue of effective temperatures, surface gravities iron and magnesium abundances, along with distances, velocity components, and orbital elements for stars in the solar vicinity. Abundances were found from 1412 determinations in 31 publications for 876 dwarfs and subgiants by means of a three-step iteration averaging procedure, with weights assigned to each source of data as well as to each individual determination. The assumed coverage completeness for data sources containing more than 5 stars, as of late 2003, exceeds 90%. For the vast majority of stars in the catalogue, the spatial-velocity components were derived from modern high-precision astrometric observations, and their galactic-orbit elements were computed using a three-component model of the Galaxy, consisting of a disk, a bulge, and a massive extended halo.