Ages, Kinematics, and Chemistry of Stellar Populations

恒星种群的年龄、运动学和化学。银河系恒星群之间的关系仍然是个谜。偏向运动学的程序，即使在颁奖期间完成了详细的建模，也能公平地对待像银河光环这样的热门人群，但不能冷却磁盘人群。因此，1991年开始的一项计划将在太阳附近完成，卡尼博士将与鲍林格林大学的约翰·莱尔德博士一起识别数千颗G矮星，然后确定准确的径向速度和金属度，以测试厚盘和薄盘群体的离散和连续模型。合成光谱的研究和使用将扩展到红外线，以期在整个圆盘中进行未来的化学和运动学研究。最近对最古老的球状星团的年龄估计与广受欢迎的大哈勃常数所暗示的膨胀年龄不一致，与局部质量密度参数无关。为了更准确地测定球状星团的年龄，需要对晕星中的氧气丰度进行更多的研究。将使用500颗贫金属星的最大似然统计视差分析来测试晕距标度。为了探测大爆炸核合成，将得到有效温度范围较大的单晕星的锂丰度。

Ages, Kinematics, and Chemistry of Stellar Populations. The relationships of the Galaxy's stellar populations remain a puzzle. Kinematically biased programs, even with the detailed modeling to be completed during the award period, do justice to hot populations like the Galactic halo but not to cool disk populations. Thus, a program begun in 1991 will be carried to completion in the solar neighborhood wherein Dr. Carney, together with Dr. John Laird at Bowling Green University, 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 study and use of synthetic spectra will be extended into the infrared in anticipation of future chemistry versus kinematics studies throughout the disk. Recent age estimates of the oldest globular clusters are inconsistent with the expansion ages implied by the popularly favored large Hubble constants, independent of the local mass density parameter. For more accurate ages of globular clusters, more work is required on the abundance of oxygen in halo stars. A test of the halo distance scale will be performed using a maximum likelihood statistical parallax analysis of 500 metal-poor stars. Lithium abundances in single halo stars with a wide range of effective temperature will be derived to probe Big Bang nucleosynthesis.