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Title (deu)
Oppenheimer-Snyder type collapse for the Einstein-Vlasov system
Speaker / Lecturer
Håkan Andréasson
Chalmers U of Technology, Gothenburg
Description (deu)

In the seminal work by Oppenheimer and Snyder from 1939 it is shown that a homogeneous ball of dust undergoes gravitational collapse. This work has had an enormous impact on the field since it predicts the existence of black holes. In this talk I will show that the Oppenheimer-Snyder type collapse can be approximated arbitrary well by solutions to the Einstein-Vlasov system. It is crucial for the argument to work in Painlevé-Gullstrand coordinates rather than in comoving coordinates which is standard in the case of dust. Extensions of this result to the inhomogeneous case will also be discussed. In particular, there exist inhomogeneous data for dust which give rise to naked singularities, and it is thus of great importance to understand the relation between dust solutions and the solutions to the Einstein-Vlasov system in the context of the weak cosmic censorship conjecture. This is a joint work with Gerhard Rein.

Keywords (deu)
Nonlinear WavesRelativity
Subject (eng)
ÖFOS 2012 -- 103 -- Physics, Astronomy
Type (eng)
Language
[eng]
Persistent identifier
https://phaidra.univie.ac.at/o:2066080
Date created
2024-05-07
Place of creation (eng)
ESI
Duration
54 minutes 03 seconds
Content
Details
Object type
Video
Format
video/mp4
Created
13.05.2024 11:15:53
Metadata