


(PPT) QuasiSpherical Gravitational Collapse 
Institute of Theoretical Physics Chinese Academy of Sciences 
学术报告 
Title 题目 
QuasiSpherical Gravitational Collapse 
Speaker 报告人 
Dr. Ujjal Debnath 
Department of Mathematics, Bengal Engineering and Science University, India 
Date 日期 
20120613 PM 14:00 Wednesday 
Venue 地点 
ITP New Building 6420, 理论物理研究所新楼四层多媒体教室 
Abstract 摘要 
The Cosmic Censorship Conjecture is yet one of the unresolved problems in General Relativity. It states that the spacetime singularity produced by Gravitational Collapse must be covered by the horizon. In fact the conjecture has not yet any precise mathematical proof. Most of the counter examples of Cosmic Censorship Conjecture present in the literature either belong to Vaidya spacetime or to the TolmanBondi spacetime. Here the objective is to fully investigate the situation in the background of higher dimensional Szekeres spacetime. The higher dimensional Szekeres's metric has been presented and the corresponding quasispherical solution has been found for dust case. The condition for shellfocusing singularity have been found by considering outgoing radial null geodesic which terminate in the past at the central singularity. The time difference between the formation of apparent horizon and central singularity have been analyzed due to gravitational collapse. Finally, the nature of central shell focusing singularity (naked singularity or black hole) for dust and imperfect fluid collapse have been investigated.  PPT下载 


