Title题目 

Gravitational Collapse in Vaidya Space-Time 

Speaker报告人 

Dr. Ujjal Debnath 

Department of Mathematics, Bengal Engineering and Science University, India 

Date日期 

2013-09-18 PM 15:00 Wednesday 

Venue地点 

Conference Hall 322, ITP/理论物理所322报告厅 

Abstract摘要 

We investigate exact solution in higher dimensional generalized Vaidya model for a null fluid source with pressure and density are related by the following relations (i) barotropic fluid with linear equation of state, (ii) variable modified Chaplygin and (iii) polytropic fluid. We study the nature of singularity (naked singularity or black hole) in gravitational collapse for the above equations of states and also for different choices of the parameters. The existence of naked singularity in Vaidya space-time is investigated by studying radial null geodesics emerging from the singularity. It is found that the nature of singularity is independent of these choices of different equation of states except for variable Chaplygin model. Finally, we also investigate the matching conditions of Vaidya model with interior Szekeres space-time. 

Contact所内联系人 

蔡荣根