Ages, Kinematics, and Chemistry of Stellar Populations

恒星族群的年龄、运动学和化学

• 批准号: 9221711
• 负责人: John Laird
• 金额: $ 11.46万
• 依托单位: Bowling Green State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-01 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9221711&HistoricalAwards=false
• 关键词: Ages; Kinematics; Chemistry; Stellar; Populations

Ages, Kinematics, and Chemistry of Stellar Populations. A program begun in 1991 will be carried to completion in the solar neighborhood wherein Dr. Laird, together with Dr. Bruce Carney at the University of North Carolina, will identify several thousand G dwarf stars, then determine accurate radial velocities and metallicities to test the discrete versus continuum models of the thick disk and thin disk populations. The local sample will be complemented by an on-going program aimed at the outer Galactic disk, now detected in the direction of the southern Galactic warp. The age of the thin disk relative to the thick disk and halo will be derived using field binary stars. The study of the nearest neighboring extragalactic disk population, that of the Large Magellanic Cloud, will be studied from high precision radial velocities and metallicities of giant stars.

恒星族的年龄、运动学和化学。 1991年开始的一项计划将在太阳系附近进行到底，其中莱尔德博士与北卡罗来纳大学的布鲁斯·卡尼博士将识别数千颗G矮星，然后确定准确的径向速度和金属丰度，以测试厚盘和薄盘群的离散模型与连续模型。 当地样本将由一项针对外银河盘的正在进行的计划进行补充，该计划现已在南银河扭曲方向进行检测。 薄盘相对于厚盘和光晕的年龄将使用场双星得出。 对最近的邻近河外盘群，即大麦哲伦星云的研究，将从巨星的高精度径向速度和金属丰度中进行研究。