A snapping cosmic string in a de Sitter or anti-de Sitter universe

Details A snapping cosmic string in a de Sitter or anti-de Sitter universe A snapping cosmic string in a de Sitter or anti-de Sitter universe

2004-03-22

arxiv.org/abs/gr-qc/0403089v1

Class.Quant.Grav. 21 (2004) 2537-2548

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, 2 figures. To appear in Classical and Quantum Gravity

Scientific paper

10.1088/0264-9381/21/11/002

We present and describe an exact solution of Einstein's equations which represents a snapping cosmic string in a vacuum background with a cosmological constant $\Lambda$. The snapping of the string generates an impulsive spherical gravitational wave which is a particular member of a known family of such waves. The global solution for all values of $\Lambda$ is presented in various metric forms and interpreted geometrically. It is shown to represent the limit of a family of sandwich type N Robinson-Trautman waves. It is also derived as a limit of the C-metric with $\Lambda$, in which the acceleration of the pair of black holes becomes unbounded while their masses are scaled to zero.

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