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

作　　者：Yue Wu A-Li Luo Hai-Ning Li Jian-Rong Shi Philippe Prugniel Yan-Chun Liang Yong-Heng Zhao Jian-Nan Zhang Zhong-Rui Bai Peng Wei Wei-Xiang Dong Hao-Tong Zhang Jian-Jun Chen 

机构地区：[1]National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China [2]Universitede Lyon, Universite Lyon 1, Villeurbanne, F-69622, France CRAL, Observatoire de Lyon, CNRS UMR 5574, 69561 Saint-Genis Laval, France [3]Key Laboratory of Optical Astronomy, NAOC, Chinese Academy of Sciences [4]Graduate University of Chinese Academy of Sciences, Beijing 100049, China [5]Shandong University at Weihai, Weihai 264209, China

出　　处：《Research in Astronomy and Astrophysics》2011年第8期924-946,共23页天文和天体物理学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos. 10973021, 10778626 and 10933001);the National Basic Research Development Program of China (Grant No. 2007CB815404);the China Scholarship Council (CSC) (Grant No. 2007104275)

摘　　要：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 metaUicity [Fe/H]）. We show that ULySS is reliable for determining 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 （LAMOST）. The results were compared with the SDSS/SEGUE Stellar Parameter Pipeline （SSPP）, and we derived precisions of 167 K, 0.34dex, and 0.16dex for Teff, logg and [Fe/H] respectively. Furthermore, 120 of these stars are selected to construct the primary stellar spectral template library （Version 1.0） of LAMOST, and will be deployed as basic ingredients for the LAMOST automated parametrization pipeline.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 metaUicity [Fe/H]）. We show that ULySS is reliable for determining 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 （LAMOST）. The results were compared with the SDSS/SEGUE Stellar Parameter Pipeline （SSPP）, and we derived precisions of 167 K, 0.34dex, and 0.16dex for Teff, logg and [Fe/H] respectively. Furthermore, 120 of these stars are selected to construct the primary stellar spectral template library （Version 1.0） of LAMOST, and will be deployed as basic ingredients for the LAMOST automated parametrization pipeline.

关 键 词：astronomical data bases： atlases -- stars： fundamental parameters techniques： spectroscopic -- surveys 

分 类 号：P148[天文地球—天体物理] TH751[天文地球—天文学]