LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) — The survey's science plan
LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) — The survey's science plan
复制标题
DOI：
10.1088/1674-4527/12/7/003
复制
发表时间：
2012-06
影响因子：
1.8
通讯作者：
L. Deng;H. Newberg;Chao Liu;J. Carlin;T. Beers;Li Chen;Yuqin Chen;N. Christlieb;C. Grillmair-C.-Grillma
中科院分区：
文献类型：
--
作者：
L. Deng;H. Newberg;Chao Liu;J. Carlin;T. Beers;Li Chen;Yuqin Chen;N. Christlieb;C. Grillmair-C.-Grillma
我们描述了目前计划使用郭守敬望远镜（GSJT，以前称为大天区多目标光纤光谱望远镜- LAMOST）光谱调查银河系中的数百万颗恒星。该调查将获得250万颗恒星的光谱，在暗/灰色时间比r < 19亮，在月光下或透明度低的夜晚比r < 17或J < 16亮的500万颗恒星。调查将于2012年秋季开始，至少持续四年。望远镜的设计限制了观测的最佳赤经范围为10° < δ < 50°，而场地条件导致重点放在银河系反中心方向的恒星上。调查分为三个部分，不同的目标选择策略：磁盘，反中心，和球体。由此产生的数据集将用于研究银河系的合并历史，磁盘的子结构和演变，通过识别最低金属量的恒星来研究第一代恒星的性质，以及通过研究疏散星团和OB协会来研究星星的形成。在对试点调查结果进行审查之后，将于2012年夏季完成LAMOST银河系了解和探索实验调查的详细设计。
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 r < 19 during dark/grey time, and 5 million stars brighter than r < 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.