报告摘要

There are many observational evidences for the co-evolution between the supermassive black hole and its host galaxy. It is widely thought that the underlying physical mechanism is the interaction between the central active galactic nuclei and the galaxy, i.e., AGN feedback. This is a rapidly developping field and most details of how it works remain unsolved. In this talk, I will first introduce some background of AGN feedback, then I will focus on our recent series of

works on AGN feedback which are based on high-resolution hydrodynamical numerical simulation. Compared to many simulation works in this field, our simulation can well resovle the Bondi radius thus can precisely calculate the accretion rate. More importantly, we adopt state-of-art AGN physics, including the proper discrimination of

cold and hot accretion modes and the exact descriptions of the AGN radiation and wind in each mode. Physical processes such as star formation and SNe feedback are taken into account. I will discuss the effects of AGN feedback on the AGN light curve, growth of the black hole mass, AGN duty cycle, star formation, and X-ray surface brightness of the galaxy.

报告人

袁峰研究员 (中国科学院上海天文台)

报告人介绍

报告人袁峰，中科院上海天文台研究员。他1997年于中国科技大学获得博士学位，随后先后赴南京大学、德国马普射电天文研究所、美国哈佛大学、普渡大学等进行博士后研究工作。2005年入选科学院百人计划回国到上海天文台工作，现任上海天文台学术委员会主任、上海天文台副台长。主要研究方向是黑洞吸积理论、活动星系核、星系演化、黑洞双星等。发表论文100余篇，包括在ARA&A上的一篇综述论文。近年来连续入选爱斯维尔高被引学者榜单，在IAU Symposium等国际会议做邀请报告40余次。

地点

物理学院新楼5楼多功能厅

时间

2019年4月19日上午10点-12点

邀请人