Ages, Kinematics, and Chemistry of Stellar Populations

恒星群的年龄、运动学和化学。1991年开始的一个项目将在太阳附近完成，莱尔德博士将与北卡罗来纳大学的布鲁斯·卡尼博士一起，确定几千颗G矮星，然后确定精确的径向速度和金属丰度，以测试厚盘和薄盘人口的离散与连续模型。当地的样本将被一个正在进行的计划补充，该计划的目标是外星系盘，现在在银河系南部的翘曲方向被探测到。薄盘相对于厚盘和光晕的年龄将由场双星计算得出。对离我们最近的星系外盘群，即大麦哲伦星云的盘群的研究，将从巨星的高精度径向速度和金属丰度进行研究。

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.