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

用球状星团丰度不均一性研究恒星演化和银晕形成0406988格雷姆史密斯博士。加州大学圣克鲁斯分校的格雷姆·史密斯将开展一个项目，调查红巨星内部混合的程度，并随后产生改变的表面丰度，并探索银晕的起源。在这项工作中，银河系球状星团的化学丰度不均匀性将被用于三个方面：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将调查CN强红巨星在不同性质的星系团中的发生率是否以及如何变化；3)PI将确定CN强巨星在晕场中的存在程度，以及与人马座矮星系有关的球状星系。这项拟议研究的更广泛影响在于学生培训，一名博士论文学生参与了这项研究。

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.