文章基本信息

标题：LAMOST DR1: Stellar Parameters and Chemical Abundances with SP_Ace
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作者：C. Boeche ; M. C. Smith ; E. K. Grebel 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2018
卷号：155
期号：4
页码：1-22
DOI：10.3847/1538-3881/aab5af
语种：English
出版社：American Institute of Physics
摘要：We present a new analysis of the LAMOST DR1 survey spectral database performed with the code SP_Ace, whichprovides the derived stellar parameters Teff , log g, [Fe/H], and [α/H] for 1,097,231 stellar objects. We tested the reliability of our results by comparing them to reference results from high spectral resolution surveys. The expected errors can be summarized as ∼120K in Teff , ∼0.2 in log g, ∼0.15dex in [Fe/H], and ∼0.1dex in [α/Fe] for spectra with S/N>40, with some differences between dwarf and giant stars. SP_Ace provides error estimations consistent with the discrepancies observed between derived and reference parameters. Some systematic errors are identified and discussed. The resulting catalog is publicly available at the LAMOST and CDS websites.
关键词：catalogs;Galaxy: abundances;stars: abundances;surveys