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Gravitational fields with a non Abelian bidimensional Lie algebra of symmetries

G. Sparano, G. Vilasi, A. M. Vinogradov

gr-qcarXiv:gr-qc/0102112

Abstract

Vacuum gravitational fields invariant for a bidimensional non Abelian Lie algebra of Killing fields, are explicitly described. They are parameterized either by solutions of a transcendental equation (the tortoise equation) or by solutions of a linear second order differential equation on the plane. Gravitational fields determined via the tortoise equation, are invariant for a 3-dimensional Lie algebra of Killing fields with bidimensional leaves. Global gravitational fields out of local ones are also constructed.

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