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Dynamic cosmic strings. I

Dynamic cosmic strings. I
Dynamic cosmic strings. I
The field equations for a time dependent cylindrical cosmic string coupled to gravity are reformulated in terms of geometrical variables defined on a (2+1)-dimensional spacetime by using the method of Geroch decomposition. Unlike the 4-dimensional spacetime the reduced case is asymptotically flat. A numerical method for solving the field equations which involves conformally compactifying the space and including null infinity as part of the grid is described. It is shown that the code reproduces the results of a number of vacuum solutions with one or two degrees of freedom. In the final section the interaction between the cosmic string and a pulse of gravitational radiation is briefly described. This is fully analyzed in the sequel.
1550-7998
024011-[14pp]
Sjödin, K.R.P.
569c8681-f335-4729-b88e-5cfc5b0d5ac1
Sperhake, U.
cf4a7e32-ded0-4733-92a7-89318207c158
Vickers, J.A.
719cd73f-c462-417d-a341-0b042db88634
Sjödin, K.R.P.
569c8681-f335-4729-b88e-5cfc5b0d5ac1
Sperhake, U.
cf4a7e32-ded0-4733-92a7-89318207c158
Vickers, J.A.
719cd73f-c462-417d-a341-0b042db88634

Sjödin, K.R.P., Sperhake, U. and Vickers, J.A. (2000) Dynamic cosmic strings. I. Physical Review D, 63 (2), 024011-[14pp]. (doi:10.1103/PhysRevD.63.024011).

Record type: Article

Abstract

The field equations for a time dependent cylindrical cosmic string coupled to gravity are reformulated in terms of geometrical variables defined on a (2+1)-dimensional spacetime by using the method of Geroch decomposition. Unlike the 4-dimensional spacetime the reduced case is asymptotically flat. A numerical method for solving the field equations which involves conformally compactifying the space and including null infinity as part of the grid is described. It is shown that the code reproduces the results of a number of vacuum solutions with one or two degrees of freedom. In the final section the interaction between the cosmic string and a pulse of gravitational radiation is briefly described. This is fully analyzed in the sequel.

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Published date: 2000

Identifiers

Local EPrints ID: 29331
URI: http://eprints.soton.ac.uk/id/eprint/29331
ISSN: 1550-7998
PURE UUID: 0afd060e-0b67-4097-a092-3b98e86bf119
ORCID for J.A. Vickers: ORCID iD orcid.org/0000-0002-1531-6273

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Date deposited: 19 Jul 2006
Last modified: 28 Jun 2022 01:32

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Contributors

Author: K.R.P. Sjödin
Author: U. Sperhake
Author: J.A. Vickers ORCID iD

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