Spectroscopic Investigations of Early Galactic Nucleosynthesis

Sneden，Christopher“早期银河核合成的光谱学研究“AST-9987132 Dr. Sneden正在对银河系晕中选定的球状星团和场星进行高分辨率光谱研究。 主要目标是拼凑早期银河核合成的历史。 目前，关于这段早期历史有许多模型，也有许多相互矛盾的数据。 Sneden博士负责协调不同研究小组的工作，研究恒星丰度分析中几个最棘手的问题，例如包络混合，即水平分支高度演化恒星的所谓“第二参数”问题，以及红巨星中锂、钍和铁峰值元素的丰度异常。该项目由美国国家科学基金会恒星天文天体物理学计划（AST/SAA）提供资金。*

Sneden, Christopher"Spectroscopic Investigations of Early Galactic Nucleosynthesis"AST-9987132Dr. Sneden is conducting a high-resolution spectroscopic study of selected globular cluster and field stars in the Galactic halo. The primary goal is to piece together the history of early Galactic nucleosynthesis. At the present time there are many models for this early history, and much conflicting data. Dr. Sneden coordinates a diverse group of researchers working on several of the most vexing problems in stellar abundance analysis, such as envelope mixing, the so-called 'second parameter' problem for highly evolved stars on the horizontal branch, and abundance anomalies of lithium, thorium and iron peak elements in red giant stars.Funding for this project was provided by the NSF program for Stellar Astronomy & Astrophysics (AST/SAA).***