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标题：THE SPACE INTERFEROMETRY MISSION ASTROMETRIC GRID GIANT STAR SURVEY. III. BASIC STELLAR PARAMETERS FOR AN EXTENDED SAMPLE
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作者：Dmitry Bizyaev ; Verne V. Smith ; Katia Cunha 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2010
卷号：140
期号：6
DOI：10.1088/0004-6256/140/6/1911
语种：English
出版社：American Institute of Physics
摘要：We present results of high-resolution (~55000) spectral observations of 830 photometrically pre-selected candidate red giants in the magnitude range of V = 9-12. We develop a pipeline for automated determination of the stellar atmospheric parameters from these spectra and estimate T eff, log g, [Fe/H], microturbulence velocity, and projected rotational velocities, vsin i, for the stars. The analysis confirms that the candidate selection procedure yielded red giants with very high success rate. We show that most of these stars are G and K giants with slightly subsolar metallicity ([Fe/H] ~ –0.3 dex). An analysis of Mg abundances in the sample results in consistency of the [Mg/Fe] vs [Fe/H] trend with published results.
关键词：stars: abundances;stars: atmospheres;stars: fundamental parameters;stars: late-type;stars: rotation Online-only material: machine-readable and VO tables