Spectroscopic Investigations of the Chemistry of the Galaxy

银河系晕区的贫金属星 星系比任何已知的星系都更能反映出 在历史的早期创造了物质的丰富历史 宇宙的最高点 一种新型的中阶梯光栅CCD（Charged Coupled Device 首席研究员（PI） 计划一个为期两年的计划，将完成一项调查“重 中子俘获”丰度（周期性周期中的元素Ba至Yb 表）中的光环明星，这是由早期的NSF奖支持 跟他 然后，他将进行一项调查， “超金属贫”恒星。 这个程序利用了 最近探测器的发展，使PI 观测光晕中越来越暗的恒星 我们对银河系化学史的了解 这一代的恒星，可能是在10亿年内形成的。 大爆炸

The "metal poor" stars in the halo region of our Milky Way Galaxy reflect more closely than any known others the chemical abundance history of matter created at early epochs in the history of the Universe. Using a new echelle-CCD (Charged Coupled Device detector) at McDonald Observatory, the Principal Investigator (PI) plans a two-year program that will complete a survey of "heavy neutron capture" abundances (elements Ba through Yb in the periodic table) among halo stars which was supported by an earlier NSF award to him. He will then undertake a survey of the abundances of all accessible "ultrametal poor" stars. This program exploits the recent detector developments which have permitted the PI to survey fainter and fainter stars in the halo and thereby push our knowledge of the Galaxy's chemical history back to the first generation of stars, formed perhaps within a billion years of the Big Bang.