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BIMSA General Relativity Seminar
Causal Structure of Singularities Formed in Gravitational Collapse
Causal Structure of Singularities Formed in Gravitational Collapse
演讲者
时间
2024年09月23日 15:30 至 17:00
地点
A3-2-301
线上
Zoom 559 700 6085
(BIMSA)
摘要
In this talk, I will begin by briefly discussing the global causal conditions of spacetime manifolds, the singularity theorem, and the cosmic censorship conjecture. I will then show the possibility of the formation of non-spacelike singularities in both spherical and non-spherical gravitational collapse, employing the Lemaitre-Tolman-Bondi (LTB) and Szekeres metrics to model these scenarios, respectively. Furthermore, I will demonstrate the non-zero probability of non-spacelike singularities arising in the presence of non-zero pressure. Finally, I will discuss some key unresolved issues that must be explored to gain a deeper understanding of the causal structure of singularities in gravitational collapse.
演讲者介绍
Dipanjan Dey is a postdoctoral fellow at BIMSA, working under the guidance of Professor Shing-Tung Yau and Professor Lars Andersson. His research focuses on gravitational collapse, the causal structure of spacetime singularities, and the spinor structure of spacetime manifolds.