Stellar Spectroscopy and Nucleosynthesis

兰伯特，大卫AST 96-18414 兰伯特博士和合作者将对这种化学物质进行各种各样的调查 丰富的恒星将提供深入了解恒星核合成过程， 银河系化学演化 各种各样的项目包括调查附近的F和 G矮星来确定年龄和空间依赖的化学成分在中间 丰度模式出现急剧转变的金属丰度，镁的测定 同位素丰度有可能限制超新星的模型，观测 旨在阐明晚型AGB星中s过程的性质， 探索了几组恒星，提出了化学难题。“许多项目都是 PI和合作者以前的结果，以及一些观察结果， 新的红外光谱仪器在国家设施和新的 Hobby-Eberly Telescope望远镜 ***

Lambert, David AST 96-18414 Dr. Lambert and collaborators will carry out a diverse array of investigations into the chemical abundances of stars that will provide insieht into the processes of stellar nucleosynthesis and galactic chemical evolution. The wide variety of projects includes investigations of nearby F and G dwarfs to define the age and spatial dependence of chemical compositions at intermediate metallicities where sharp transitions in abundance patterns are seen, determination of Mg isotopic abundances that have the potential to constrain models of supernovae, observations directed at illuminating the nature of the s-process operating in late-type AGB stars, and the exploration of several groups of stars that present chemical 'puzzles.' Many of the projects build on previous results of the PI and collaborators, and a number of observations intend to make use of the new IR spectroscopic instrumentation available at national facilities and new instrumentation at the Hobby-Eberly Telescope. ***