Galactic Chemical Evolution Through High Resolution Spectroscopy

通过高分辨率光谱学研究银河化学演化

• 批准号: 0307495
• 负责人: Christopher Sneden
• 金额: $ 25.14万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-01 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307495&HistoricalAwards=false
• 关键词: Galactic; Chemical; Evolution; Through; Resolution

PI: SnedenAST-0307495University of Texas, AustinDr. Sneden will carry out spectroscopic studies that explore the early chemical evolution of the Milky Way galaxy. His program focuses on the most metal-deficient stars of the Galaxy, those whose chemical abundances can yield the most insight into both the formation and evolution of the Galaxy and the details of stellar nucleosynthesis and evolution. A large program of high resolution spectroscopy of key samples of low metallicity thick disk and halo populations will allow a comparison of the chemical composition of halo stars with those of similar metallicity now proposed to be associated with the thick disk, an expansion of the number of extremely metal-poor stars that have well-determined detailed abundance distributions, and the creation of a statistically meaningful sample of abundances in binary blue metal-poor stars. He will also carry out abundance analyses of several outer halo globular clusters, a population that has not been studied as thoroughly as the more nearby clusters. In this work, he will explore the use of Fabry-Perot imaging for very large samples of cluster abundance studies. Many of his activities will have broad impact. He will continue his collaboration with the atomic physics group at the University of Wisconsin to combine lab and solar abundance studies of selected elements. He will continue to develop and to make available to the community his widely used software and linelist data. He will participate in a series of seminar for secondary school teachers, particularly in leading them in workshops at the McDonald Observatory.***

PI：SnedenAST-0307495德克萨斯大学奥斯汀分校博士Sneden将进行光谱研究，探索银河系的早期化学演化。 他的计划侧重于银河系中最缺乏金属的恒星，这些恒星的化学丰度可以最深入地了解银河系的形成和演化以及恒星核合成和演化的细节。 对低金属丰度厚盘和晕族的关键样本进行高分辨率光谱分析的大型计划将允许将晕星的化学成分与现在提出的与厚盘相关的类似金属丰度的化学成分进行比较，扩大具有明确详细丰度分布的极端贫金属恒星的数量，以及创造一个统计上有意义的样本丰度的蓝色贫金属双星。 他还将对几个外晕球状星团进行丰度分析，这些星团还没有像附近的星团那样被彻底研究过。 在这项工作中，他将探索使用法布里-珀罗成像的集群丰度研究的非常大的样本。 他的许多活动将产生广泛的影响。 他将继续与威斯康星州大学的原子物理小组合作，将联合收割机实验室和太阳丰度研究结合起来。 他将继续开发并向社区提供他广泛使用的软件和数据。 他将参加一系列为中学教师举办的研讨会，特别是带领他们参加麦克唐纳天文台的工作坊。