Soliton propagation on a gravitational plane-wave collision spacetime

Details Soliton propagation on a gravitational plane-wave collision spacetime Soliton propagation on a gravitational plane-wave collision spacetime

1996-09-13

arxiv.org/abs/gr-qc/9609041v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, 2 postscript figures, Latex

Scientific paper

We present a new family of exact solutions of the Einstein equations, constructed through the Khan-Penrose procedure, that may be interpreted as representing the propagation of a pair of solitons, in the background of a plane-wave collision spacetime. The metric in the interaction region is obtained as a diagonal solitonic perturbation of Rindler's spacetime, applying the Belinskii and Zakharov Inverse Scattering Method (ISM), with two real poles and a pair of complex conjugate poles. We use a non-standard renormalization procedure, obtaining solutions that contain two more parameters than in the standard ISM. We analyze the asymptotic behaviour of the solutions in the limit where the determinant of the Killing part of the metric vanishes, finding in this limit a curvature singularity, except when the free parameters contained in the solutions satisfy a particular relation. Assuming this condition is satisfied, we show that the metric is regular in the above mentioned limit, and that the spacetimes contain in this case a Killing Cauchy horizon instead of a curvature singularity. The solutions are analytically extended through the horizon, and we find a curvature singularity in this extension, related to the presence and propagation of the complex poles.

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