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The characteristic initial value problem for colliding plane waves: the linear case

J B Griffiths and M Santano-Roco

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The physical situation of the collision and subsequent interaction of plane gravitational waves in a Minkowski background gives rise to a well-posed characteristic initial value problem in which initial data are specified on the two null characteristics that define the wavefronts. In this paper, we analyse how the Abel transform method can be used in practice to solve this problem for the linear case in which the polarization of the two gravitational waves is constant and aligned. We show how the method works for some known solutions, where problems arise in other cases, and how the problem can always be solved in terms of an infinite series if the spectral functions for the initial data can be evaluated explicitly.


PACS

04.20.Jb Exact solutions

04.30.Nk Wave propagation and interactions

04.20.Ex Initial value problem, existence and uniqueness of solutions

MSC

34A12 Initial value problems, existence, uniqueness, continuous dependence and continuation of solutions

83C35 Gravitational waves

Subjects

Gravitation and cosmology

Dates

Issue 16 (21 August 2002)

Received 29 April 2002

Published 30 July 2002



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