期刊
ASTRONOMICAL JOURNAL
卷 155, 期 4, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/1538-3881/aab5af
关键词
catalogs; Galaxy: abundances; stars: abundances; surveys
资金
- National Key Basic Research Program of China 973 Program [2014 CB845700, 2014 CB845702]
- National Natural Science Foundation of China (NSFC) [11673083, 11333003, 11373054]
- German Research Foundation (DFG) [Sonderforschungsbereich SFB 881]
- Australian Research Council [FT1400147]
- National Development and Reform Commission
We present a new analysis of the LAMOST DR1 survey spectral database performed with the code SP_Ace, which provides the derived stellar parameters T-eff, log g, [Fe/H], and [alpha/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 similar to 120. K in T-eff, similar to 0.2 in log g, similar to 0.15. dex in [Fe/H], and similar to 0.1. dex in [alpha/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.
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