【直播】【李政道研究所】Dr. Maosheng Xiang 学术报告

直播信息

报告题目

Galactic archaeology: uncovering the formation history of our Galaxy with large sky surveys

报告人

Dr. Maosheng Xiang（Max-Planck Institute for Astronomy）

报告时间

2022年7月5日（周二）15:00

主办方

李政道研究所

直播二维码

直播海报

报告人介绍

2022.8 -- NAOC, faculty
2018.7 -- 2022.7, MPIA, postdoc researcher
2015.7 -- 2018.6, NAOC, postdoc, LAMOST fellowship
2010.9 -- 2015.6, DoA/KIAA, Peking University, PhD (advisor: Prof.Xiaowei Liu)
2006.9 -- 2010.6, DoA, Beijing Normal University, Bachelor

Research field: spectroscopic survey, stellar astrophysics, Milky Way archaeology and near-field cosmology.

I'm actively involved in the study of a number of ground-based and space surveys, such as LAMOST, Gaia, ET, CSST

报告摘要

Our Galaxy, the Milky Way, is the only giant galaxy that we are able to characterize the physical properties for billions of individual stellar bodies in high dimensions (3D position, 3D motion, detailed chemical abundances, age, etc.), it thus serves as an irreplaceable astrophysical laboratory for understanding the matter constitutes, formation and evolution history of galaxies and near-field cosmology. Galactic archaeology aims to reconstruct the origin, assembly and evolution history of our Galaxy through detailed studies of chemical and kinematic fingerprint of the stellar fossils that spread the entire age range of the universe. Achieving this ambitious goal relies on acquiring the fundamental properties and physical parameters of large samples of stars, which is the core scientific goal of several ongoing and upcoming large-scale sky surveys.

In this talk, I will introduce our efforts on conducting Galactic archaeology studies using data from LAMOST -- the largest ongoing stellar spectroscopic surveys, and Gaia -- a large and full-sky precision astrometric survey. With big data from these surveys, we are able to precisely determine the ages, chemical abundances, and orbits for millions of stars, thus to uncover mysteries of the Galactic formation history, particularly the history at the early epoch, during the first few Gyrs.

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编辑：王媛媛

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