报告题目：The nature of stars with common origin: clues from metallicity, elemental abundances, and kinematics

　　摘 要：The aim of my research is to search for the origins of group of stars with similar kinematics making use of their chemical signatures. We firstly employ modified chemical tagging method to look for the lost siblings of the Sun. Star HIP 40317 that has very similar abundance pattern to the Sun is likely a solar sibling. However, it is not directly supported by our dynamical arguments. Then, we also explore the possible origins of a newly discovered stellar stream. We exclude a dissolved star cluster as the progenitor of the KFR08 steam based on the results of chemical tagging experiment, while the KFR08 stream originated from the thick disk population, which was perturbed by a massive merger in the early Universe.
     NGC 6528 is the most metal-rich globular cluster in bulge. We develop a new method to accurately measure physical parameters and metallicity for a large sample of red giant brach stars. The metallicity distribution and elemental abundance analysis of NGC 6528 members suggest that the cluster experienced chemical enrichment dominated by SNe II, while having smaller contributions from both SNe Ia and intermediate-mass AGB stars.

　　报 告 人：刘成 博士 （瑞典隆德大学）

　　报告人简介：刘成博士2015在瑞典隆德大学获得博士学位，在天文学与理论物理系从事天文研究，主要方向：通过高色散光谱数据研究恒星内部的元素丰度，同时得到恒星的其它物理参数。（更详细介绍请见附件CV）

　　报告时间：2016年3月28（周一）下午17：00

　　报告地点：台本部110会议室

　　联 系 人：黄春苹 0991-3689050