Studying Stellar Evolution and Galactic Halo Formation with Globular Cluster Abundance Inhomogeneities

研究恒星演化和银河晕形成与球状星团丰度不均匀性

• 批准号: 0406988
• 负责人: Graeme Smith
• 金额: --
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-01 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0406988&HistoricalAwards=false
• 关键词: Studying; Stellar; Evolution; Galactic; Halo

Studying Stellar Evolution and Galactic Halo Formation with Globular Cluster Abundance InhomogeneitiesABSTRACTAST 0406988 Graeme SmithDr. Graeme Smith, at the University of California, Santa Cruz, will undertake a program to investigate the extent to which red giant stars undergo interior mixing and subsequently produce altered surface abundances, and to probe the origin of the Galactic halo. Chemical abundance inhomogeneities of Galactic globular clusters will be used in a three-pronged approach in this effort: 1) The PI will determine whether deep mixing in globular red giants depends on the star's metallicity; 2) The PI will investigate if and how the incidence of CN-strong red giants varies in clusters with different properties and 3) The PI will determine the extent to which CN-strong giants are present in the halo field, and globulars associated with the Sagittarius dwarf galaxy. The broader impact of this proposed research resides with student training, with the involvement of a Ph.D. thesis student in the research.

基于球状星团丰度不均匀性的恒星演化和星系晕形成研究[j]。加州大学圣克鲁兹分校的格雷姆·史密斯（Graeme Smith）将承担一个项目，调查红巨星在多大程度上经历了内部混合，并随后产生了表面丰度的变化，并探索银河晕的起源。银河系球状星团的化学丰度不均匀性将在这项工作中用于三个方面：1)PI将确定球状红巨星的深度混合是否取决于恒星的金属丰度；2) PI将研究在不同性质的星团中cn -强红巨星的发生率是否以及如何变化；3)PI将确定在与人马座矮星系相关的晕场和球状星团中cn -强巨星的存在程度。这项建议的研究的更广泛的影响在于学生的训练，与博士论文的学生参与研究。