题目：Astrophysical Black Holes
报告人：哈佛大学 Ramesh Narayan
教授 （美国科学院院士、英国皇家学会院士）
时间：6月15日（周一）下午3:00
地点：厦大科艺中心1号会议室
摘要：
A black hole is an object which is so compact, and whose gravitational pull
is so strong, that nothing -- not even light – can escape from its
interior. The concept of a black hole is very bizarre and one feels that
something in physics ought to prevent the formation of such objects. Yet, the
universe contains countless numbers of black holes; some that weigh only
about ten times the mass of the Sun and others as much as a billion times
more. Even though light cannot escape from inside a black hole, gas flowing
into the hole does emit very intense radio waves, light, X-rays and gamma
rays before falling in. Astronomers study such radiation with telescopes
based on the ground and those launched into space. This talk will describe
the kinds of black holes that have been discovered, their observational
manifestations, and what they teach us about the formation of compact objects
in nature.
