报告题目：Gravitational Collapse: Black Hole or Buchdahl Star ?

报告人：Naresh Dadhich  教授（Inter University Centre for Astronomy and Astrophysics）

报告时间：2025 年 11 月 5 日（周三）10 : 00-11 : 30

报告地点：北洋园校区 49 教 410 室

报告摘要：

Gravitational collapse is supposed to end in forming a black hole and ultimately leading to a singularity which is hidden behind the event horizon. We will argue that this need not always be the case, it could really end in a Buchdahl star having a timelike boundary like any other ordinary star yet a comparable compactness of M/R = 4/9 as against M/R = 1/2 for black hole.

报告人简介：

Naresh Dadhich is an accomplished gravitational theorist with research career spanning over six decades. He was the initiator of Magnetic Penrose Process for the most efficient mining of energy from a rotating black hole, and Buchdahl star is his latest interest. He has been involved with Professor Jayant Narlikar in creating IUCAA, a leading astronomy institute, and succeeded him as its Director. He is Emeritus Professor since his retirement in 2009.