报告题目：Dynamics of the Milky Way Halo and Dark-Matter Deficient Galaxies

　　报告人：Zhaozhou Li(李昭洲)（The Hebrew University of Jerusalem）

　　报告摘要：I will discuss two topics related to the dynamics of dark-matter (DM) halos.The mass distribution beyond 100 kpc of our Milky Way (MW) halo has historically been poorly constrained due to poor observations and model uncertainties. I will introduce two new efficient data-driven methods for dynamical modeling , which provide us with the current best estimates of the MW halo mass based on the motion of MW satellite galaxies.In the second part, I will address the puzzling dearth of DM in a fraction of dwarf and high-z massive galaxies that is not reproduced in current simulations. This discrepancy highlights our limited understanding of the halo/galaxy structural evolution. I will present a novel unified model for galaxy dynamical evolution driven by feedback outflows, mergers, and tidal interactions, and show how these processes can amplify structural diversity and create DM-deficient galaxies.

　　时间：2023年12月26日（周二）10:00

　　地点：紫台5号楼516会议室

欢迎大家参加！