Global visibility of a strong curvature singularity in nonmarginally bound dust collapse

被引:16
|
作者
Mosani, Karim [1 ]
Dey, Dipanjan [2 ]
Joshi, Pankaj S. [2 ]
机构
[1] BITS Pilani, KK Birla Goa Campus, Sancoale 403726, Goa, India
[2] Charusat Univ, Int Ctr Cosmol, Anand 388421, Gujarat, India
来源
PHYSICAL REVIEW D | 2020年 / 102卷 / 04期
关键词
NONVANISHING TANGENTIAL STRESSES; GRAVITATIONAL COLLAPSE; NAKED SINGULARITY; COSMIC CENSORSHIP; BLACK-HOLES; EQUATIONS; TIME; SPACETIME;
D O I
10.1103/PhysRevD.102.044037
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We investigate here the local versus global visibility of a spacetime singularity formed due to the gravitational collapse of a spherically symmetric dust cloud having a nonzero velocity function. The conditions are investigated that ensure the global visibility of the singularity, in the sense that the outgoing null geodesics leave the boundary of the matter cloud in the future, whereas, in the past, these terminate at the singularity. Explicit examples of this effect are constructed. We require that this must be a strong curvature singularity in the sense of Tipler, to ensure the physical significance of the scenario considered. This may act as a counterexample to the weak cosmic censorship hypothesis.
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页数:13
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