Статья

Automatic determination of stellar atmospheric parameters and construction of stellar spectral templates of the Guoshoujing Telescope (LAMOST)

Yue WuGraduate University of Chinese Academy of Sciences, Beijing 100049, ChinaA-Li LuoKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of SciencesHai-Ning LiKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of SciencesJian-Rong ShiKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of SciencesPhilippe PrugnielUniversité de Lyon, Université Lyon 1, Villeurbanne, F-69622, France; CRAL, Observatoire de Lyon, CNRS UMR 5574, 69561 Saint-Genis Laval, FranceYan-Chun LiangKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of SciencesYong-Heng ZhaoKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of SciencesJian-Nan ZhangKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of SciencesZhong-Rui BaiKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of SciencesPeng WeiKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of SciencesWei-Xiang DongKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of SciencesHao-Tong ZhangKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of SciencesJian-Jun ChenKey Laboratory of Optical Astronomy, NAOC, Chinese Academy of Sciences

2011en

ABI

Аннотация

A number of spectroscopic surveys have been carried out or are planned to study the origin of the Milky Way. Their exploitation requires reliable automated methods and softwares to measure the fundamental parameters of the stars. Adopting the ULySS package, we have tested the effect of different resolutions and signal-to-noise ratios (SNR) on the measurement of the stellar atmospheric parameters (effective temperature Teff, surface gravity log g, and metallicity [Fe/H]). We show that ULySS is reliable to determine these parameters with medium-resolution spectra (R~2000). Then, we applied the method to measure the parameters of 771 stars selected in the commissioning database of the Guoshoujing Telescope (GSJT). The results were compared with the SDSS/SEGUE Stellar Parameter Pipeline (SSPP), and we derived precisions of 167 K, 0.34 dex, and 0.16 dex for Teff, log g and [Fe/H] respectively. Furthermore, 120 of these stars are selected to construct the primary stellar spectra template library (Version 1.0) of GSJT, and will be deployed as basic ingredients for the GSJT automated parametrization pipeline.

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Идентификаторы

DOI: 10.1088/1674-4527/11/8/006

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar