LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) — The survey's science plan

• Published in: Research in astronomy and astrophysics Vol. 12; no. 7; pp. 735 - 754
• Main Authors: Deng, Li-Cai, Newberg, Heidi Jo, Liu, Chao, Carlin, Jeffrey L., Beers, Timothy C., Chen, Li, Chen, Yu-Qin, Christlieb, Norbert, Grillmair, Carl J., Guhathakurta, Puragra, Han, Zhan-Wen, Hou, Jin-Liang, Lee, Hsu-Tai, Lépine, Sébastien, Li, Jing, Liu, Xiao-Wei, Pan, Kai-Ke, Sellwood, J. A., Wang, Bo, Wang, Hong-Chi, Yang, Fan, Yanny, Brian, Zhang, Hao-Tong, Zhang, Yue-Yang, Zheng, Zheng, Zhu, Zi
• Format: Journal Article
• Language: English
• Published: United States Key Lab for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, Chin%Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA%Key Lab for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China%National Optical Astronomy Observatory, Tucson, AZ 85719, USA%Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China%University of Heidelberg, Landessternwarte, K(o)nigstuhl 12, D-69117 Heidelberg, Germany%Spitzer Science Center, 1200 E. California Blvd., Pasadena, CA 91125, USA%Department of Astronomy and Astrophysics, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA%Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China%Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 106, China%American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024,USA%Key Lab for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 01.07.2012; School of Physics and Electronic Information, China West Normal University, Nanchong 637000, China%Department of Astronomy & Kavli Institute of Astronomy and Astrophysics, Peking University, Beijing 100871, China%Apache Point Observatory, PO Box 59, Sunspot, NM 88349, USA%Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road,Piscataway, NJ 08854-8019, USA%Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China%Fermi National Accelerator Laboratory, Batavia, IL 60510, USA%Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA%School of Astronomy and Space Science, Nanjing University, Nanjing 210008, China
• Subjects: ASTRONOMY AND ASTROPHYSICS; halo-spectroscopy; spectroscopic-Galaxy; kinematics and dynamics-Galaxy; techniques; disk-Galaxy; evolution-Galaxy; structure-Galaxy
• ISSN: 1674-4527; 2397-6209
• DOI: 10.1088/1674-4527/12/7/003

P156%P129; We describe the current plans for a spectroscopic survey of millions of stars in the Milky Way galaxy using the Guo Shou Jing Telescope(GSJT,formerly called the Large sky Area Multi-Object fiber Spectroscopic Telescope-LAMOST).The survey will obtain spectra for 2.5 million stars brighter than Υ＜19 during dark/grey time,and 5 million stars brighter than Υ＜17 or J＜16 on nights that are moonlit or have low transparency.The survey will begin in the fall of 2012,and will run for at least four years.The telescope's design constrains the optimal declination range for observations to 10°＜δ＜50°,and site conditions lead to an emphasis on stars in the direction of the Galactic anticenter.The survey is divided into three parts with different target selection strategies:disk,anticenter,and spheroid.The resulting dataset will be used to study the merger history of the Milky Way,the substructure and evolution of the disks,the nature of the first generation of stars through identification of the lowest metallicity stars,and star formation through study of open clusters and OB associations.Detailed design of the LAMOST Experiment for Galactic Understanding and Exploration(LEGUE)survey will be completed in summer 2012,after a review of the results of the pilot survey.