Gravitational Collapse: Expanding and Collapsing Regions

Details Gravitational Collapse: Expanding and Collapsing Regions Gravitational Collapse: Expanding and Collapsing Regions

2010-08-17

arxiv.org/abs/1008.2805v1

Gen.Rel.Grav.43:1179-1188,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, 4 figures, accepted for publication in Gen. Relativ. Grav

Scientific paper

10.1007/s10714-010-0952-1

We investigate the expanding and collapsing regions by taking two well-known spherically symmetric spacetimes. For this purpose, the general formalism is developed by using Israel junction conditions for arbitrary spacetimes. This has been used to obtain the surface energy density and the tangential pressure. The minimal pressure provides the gateway to explore the expanding and collapsing regions. We take Minkowski and Kantowski-Sachs spacetimes and use the general formulation to investigate the expanding and collapsing regions of the shell.

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