报告题目：Black Holes Big and Small: Impact on Galaxy Formation

报 告 人：Luis C. Ho (何子山)，Director and University Chair Professor，Kavli Institute for Astronomy and Astrophysics, Peking University

报告时间：3月6日16：00

报告地点：理科楼郑裕彤大讲堂

报告摘要：Supermassive black holes (BHs) have been found in 87 galaxies by dynamical modeling of spatially resolved kinematics. The Hubble Space Telescope revolutionized BH research by advancing the subject from its proof-of-concept phase into quantitative studies of BH demographics. Most influential was the discovery of a tight correlation between BH mass and velocity dispersion of the bulge component of the host galaxy. Together with similar correlations with bulge luminosity and mass, this led to the widespread belief that BHs and bulges coevolve by regulating each other's growth. I present a major update to the status of this field. I will discuss

(1) how BH mass correlates tightly only with classical bulges and ellipticals,

(2) how the zero point and slopes of the fundamental correlations need to be revised,

(3) BH mass estimates in quasars and AGNs,

(4) the discovery of intermediate-mass BHs in dwarf galaxies and implications for quasar seeds,

(5) quasar-mode feedback at high redshifts, and

(6) the evolution (or lack thereof) with time of the BH-host galaxy scaling relations.