香港大学首席教授、郑广生教授应邀访问我院，并于2015年11月4日上午10：30在理学实验楼717作报告。题目和摘要如下。欢迎有兴趣的老师和研究生参加！

Title : Possible consequences of stellar tidal disruption processes by supermassive black holes

Abstract:
       Stars captured by the supermassive black holes in the galactic centers are common phenomena. Capture events occurred in distant galaxies have been observed by various of X-ray satellites. The capture rate is roughly once every tens to hundreds thousand years for normal galaxies. These capture events should also occur in the past of Milky Way. In this talk we will review some high energy phenomena in the galactic center, which may be the consequences of the past stellar capture events.