学术报告—Deciphering Galaxy Quenching: Insights from the Multiphase Circumgalactic Medium

报告摘要：

In the galactic ecosystem, the circumgalactic medium (CGM) is a massive baryon reservoir orchestrating baryonic inflows and outflows, shaping galaxy formation and evolution. Of profound significance is the swift quenching of cosmic star formation rates since cosmic noon, pivotal in unraveling present-day galaxy characteristics, yet its driving force remains uncertain. Characterizing and modeling the CGM emerges as a powerful tool for understanding this crucial transition. In this talk, I will introduce observational constraints on the multiphase CGM using multiwavelength probes. In particular, I will explore the spatial distribution of different phases, aiming to ask a fundamental question, do galaxies host all of their baryons within their halos? Moreover, I will highlight the recent improvements in constraining the thermodynamic properties, which will be the first step to resolving the fate of gas in the CGM, feeding, staying in, or escaping from the halo.

报告人简介：

Zhijie Qu is a KICP Associate Fellow at the University of Chicago, before which he obtained his PhD from the University of Michigan in 2021. Since his PhD, he has been working on observations and modeling of multi-phase circumgalactic medium. His research aims to investigate fundamental accretion and feedback processes shaping galaxy formation and evolution.