Collaborative Project: The Chemical and Dynamical Evolution of the Galaxy

AST 9988156 CarneyDr.北卡罗来纳大学的布鲁斯·卡尼和鲍林格林州立大学的约翰·莱尔德博士正在进行一系列观测项目，旨在揭示我们银河系的薄盘、厚盘和晕星群是如何组装的。对于晕群，他们将研究正常和极端速度场恒星中的S过程和r过程丰度，这些丰度是在他们最近完成的一项高自行恒星调查中发现的。对于厚盘，他们将测量恒星的径向速度和金属度，以更清楚地了解三维运动与具有金属度的银河轨道之间的关系。对于薄盘，他们将获得贫金属星和富金属星的光谱，以便直接与厚盘恒星进行比较。从数据集中，这些研究人员将获得一个均匀研究的样本，从中可以更清楚地看到这些恒星种群的化学演化。***

AST 9988156CarneyDr. Bruce Carney at the University of North Carolina and Dr. John Laird at Bowling Green State University are pursuing a series of observational projects which are meant to reveal how the thin disk, the thick disk, and the halo star populations of our Galaxy were assembled. For the halo population, they will study s-process and r-process abundances in normal and extreme velocity field stars that were identified in a survey of high proper motion stars they recently completed. For the thick disk, they will measure stellar radial velocities and metallicities to obtain a clearer view of the relation between three-dimensional motions and Galactic orbits with metallicity. For the thin disk, they will obtain spectra of metal-poor and metal-rich stars for direct comparison with the thick disk stars. From the data sets, these investigators will obtain a homogeneously studied sample from which to achieve a much clearer view of the chemical evolution of these stellar populations. ***