Comparative Chemical Evolution in Low-Mass Stellar Systems

《低质量恒星系统中的比较化学演化》AST-9987374。史密斯建议研究恒星的化学丰度在球状星团、矮球星系或麦哲伦星云等特定群体中变化的原因。一系列元素的化学丰度将在这些不同系统中发现的大样本恒星中确定。这项分析利用了最新的恒星模型大气和原子/分子数据。所选择的特定元素和恒星系统允许从原理上考察化学演化如何依赖于恒星质量和寿命。对该项目至关重要的光谱观测将通过Hobby-Eberly望远镜、Kitt Peak国家天文台和Cerro Tololo美洲天文台获得。该项目的资金由NSF恒星天文与天体物理学计划(AST/SAA)提供。*

Smith, Verne"Comparative Chemical Evolution in Low-Mass Stellar Systems"AST-9987374Dr. Smith proposes to investigate the reasons why the chemical abundances of stars vary within a given population such as a globular cluster, dwarf spheroidal galaxy or the Magellanic Clouds. The chemical abundances of a wide range of elements will be determined in a large sample of stars found in such diverse systems. The analysis utilizes the latest stellar model atmospheres and atomic/molecular data. The particular elements and stellar systems chosen permit an examination of how chemical evolution depends upon stellar masses and lifetimes and in principle . The spectroscopic observations essential to the project will be obtained with the Hobby-Eberly Telescope, Kitt Peak National Observatory and Cerro Tololo Inter-American Observatory. Funding for this project was provided by the NSF program for Stellar Astronomy & Astrophysics (AST/SAA).***