报告一：

题目：AGN Feedback via Outflows in the Early Universe,Dusty Quasars and Dwarf Galaxies.

摘要：AGN feedback through powerful outflows is deemeda critical component in modern galaxy evolution models, which may regulate supermassive black hole accretion, quench star formation, and shape the circumgalactic and intergalactic medium. However, the effectiveness of such feedback, particularly in the early universe, dusty quasars and dwarf galaxies, remains inconclusive. In this talk, I will describe our on-going effort to address these open issues. To begin with, I will present our recent discoveries of a fast, galaxy-scale outflow in one of the earliest quasars at z~7.5 and prevalent rapid outflows in a statistical sample of z>5 quasars unveiled by JWST spectroscopy. These outflows are in general energetic enough to affect the evolution of their host galaxies, with a significant portion of them much more influential than those found in similar quasars at lower redshifts. Next, I will discuss how JWST IFU data enhance our understanding of outflows in dusty quasars at lower redshifts, which allows for improved measurements of their kinematics, energetics and thus overall impact. Finally, I will highlight our investigation of AGN feedback in nearby dwarf galaxies through observations of rapid outflows and molecular gas content, which suggest that AGN feedback could still be substantial in these low-mass systems. These results can also shed light on how AGN feedback may shape the evolution of normal high-z galaxies.

报告人：刘伟哲（亚利桑那大学）

报告人简介：Weizhe Liu is a JWST Arizona/Steward Postdoc in Early galaxies and Reionization (JASPER) scholar at Steward Observatory, University of Arizona. He is mainly interested in AGN host galaxies and feedback in different systems across cosmic time, with a current focus on high-z quasars and nearby dwarf AGN. He received his PhD from the University of Maryland in 2022. Before that, he obtained his master’s degree from Shanghai Astronomical Observatory in 2016 and his bachelor’s degree from Nanjing University in 2013.

报告二：

题目：X-Ray Binary Populations in the Andromeda Galaxy: Insights from the NEW-ANGELS Survey

摘要：The Andromeda Galaxy (M31), our nearest massive spiral neighbor, provides a unique opportunity to study X-ray source populations similar to those in the Milky Way. Using the deepest and widest observations from our NEW-ANGELS survey, we have detected and analyzed over 4,500 X-ray sources across M31’s bulge, disk, and halo with XMM-Newton data. By creating X-ray luminosity functions (XLFs) for different regions and correcting for incompleteness, our study finds that M31 is dominated by low-mass X-ray binaries (LMXBs) and exhibits fainter X-ray emission compared to other nearby galaxies. The XLFs vary across different regions of M31, and by incorporating detailed star formation histories, we constrain binary luminosity evolution models. These results enhance our understanding of the relationship between stellar populations and X-ray emissions, providing important constraints for models of binary and galaxy evolution.

报告人：黄瑞（密歇根大学）

报告人简介：Rui Huang received his bachelor’s degree from Guangxi University in 2017. He completed his graduate studies at Tsinghua University in 2024,working with Prof. Wei Cui in the HUBS team. Currently,he is a postdoctoral researcher at the University of Michigan,hosted by Prof. Joel Bregman.

时间：2025年01月06日星期一9:30

地点：紫台3-302

欢迎大家参加！