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

• Published in: Research in astronomy and astrophysics Vol. 11; no. 8; pp. 924 - 946
• Main Authors: Wu, Yue, Luo, A-Li, Li, Hai-Ning, Shi, Jian-Rong, Prugniel, Philippe, Liang, Yan-Chun, Zhao, Yong-Heng, Zhang, Jian-Nan, Bai, Zhong-Rui, Wei, Peng, Dong, Wei-Xiang, Zhang, Hao-Tong, Chen, Jian-Jun
• Format: Journal Article
• Language: English
• Published: CRAL, Observatoire de Lyon, CNRS UMR 5574, 69561 Saint-Genis Laval, France 01.08.2011; Université de Lyon, Université Lyon 1, Villeurbanne, F-69622, France; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China; Key Laboratory of Optical Astronomy, NAOC, Chinese Academy of Sciences; Shandong University at Weihai, Weihai 264209, China%National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China; Key Laboratory of Optical Astronomy, NAOC, Chinese Academy of Sciences%Université de Lyon, Université Lyon 1, Villeurbanne, F-69622, France; Graduate University of Chinese Academy of Sciences, Beijing 100049, China%National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
• Subjects: fundamental parameters-techniques; astronomical data bases; spectroscopic-surveys; atlases-stars
• ISSN: 1674-4527
• DOI: 10.1088/1674-4527/11/8/006

P144.1; 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 (effec tive temperature Teff,surface gravity log9,and metallicity [Fe/H]).We show thatULySS 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,log9 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.