学术报告

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9月25日学术报告

作者: 来源:办公室 发布时间:2015年09月24日 00:00 点击次数:[]

报告人

郭俊起

单位

Tata Institute of Fundamental Research, Mumbai, India

报告时间

2015925

上午 10:00

报告地点

引力中心三楼办公室

报告题目

Spherical collapse and spacetime singularities

报告内容

Scalar collapses in flat and Reissner-Nordstrom (RN) geometries are simulated. We examine the dynamics in the vicinities of the central singularity of a Schwarzschild black hole and of the inner horizon of a RN black hole. In simulating scalar collapse in RN geometry, Kruskal-like coordinates are used with the presence of a scalar field being taken into account. It is found that, besides near the inner horizons of RN and Kerr black holes, mass inflation also takes place near the central singularity in neutral scalar collapse. Approximate analytic expressions for different types of mass inflation are partially obtained via a close interplay between numerical and analytical approaches and an examination of the connections between Schwarzschild black holes, RN black holes, neutral collapse, and charge scattering. We argue that the mass inflations near the central singularity and the inner horizon are related to the localness of the dynamics in strong gravity regions. This is in accord with the Belinskii, Khalatnikov, and Lifshitz conjecture.

报告人

Postdoc, Tata Institute of Fundamental Research, India. Sept. 2014--present

 Ph.D. Simon Fraser University, Canada. 2014

 M.A. The University of Mississippi, U.S. 2008

 M.Sc. CGE HUST, 2004

 B.Sc. 烟台师范学院(:鲁东大学) 2001

 Research interests: general relativity, numerical relativity, gravitational collapse, f(R) gravity

参会人员

基础物理组(引力组)师生