Title：Dinosaurs from the very Metal-Poor (Old) Milky Way

　　报告人：Dr. Yuan, Zhen 袁珍 (Strasbourg Observatory, CNRS, France)

　　Abstract：As the witnesses of the early Universe, dwarf galaxies, especially the low-mass ones (total mass ≤ 10^9 M⊙), carry the imprint of essential physical processes, from the formation of the first stars to the formation of the first galaxies, which shaped the universe into the one we observe today. I will show the power of searching dwarf galaxy debris in the very metal-poor (old) Milky Way, and how their detailed elemental abundances unveil stellar nucleosynthesis and galactic chemical evolution at high redshift. I will also briefly talk about my recent work of calibrating narrow band CaHK photometric data from 11,000 CFHT images to search for the very metal poor stars in the MW. In the second part of my talk, I will show our predicted dwarf galaxy detection limit of the CSST, which is an optimal tool by design to search for low-mass/faint dwarf galaxies within the Local Volume.

　　报告时间：2023年6月6日周二14:00

　　报告地点：紫台5-516会议室

　　邀请人：常江（紫金山天文台星系宇宙学与暗能量研究团组）

欢迎大家参加！