Killing Tensors from Conformal Killing Vectors

Details Killing Tensors from Conformal Killing Vectors Killing Tensors from Conformal Killing Vectors

2002-12-03

arxiv.org/abs/gr-qc/0212016v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, Latex. To appear in the Proceedings of the Spanish Relativity Meeting (Encuentros Relativistas Espanoles), 2002

Scientific paper

Some years ago Koutras presented a method of constructing a conformal Killing tensor from a pair of orthogonal conformal Killing vectors. When the vector associated with the conformal Killing tensor is a gradient, a Killing tensor (in general irreducible) can then be constructed. In this paper it is shown that the severe restriction of orthogonality is unnecessary and thus it is possible that many more Killing tensors can be constructed in this way. We also extend, and in one case correct, some results on Killing tensors constructed from a single conformal Killing vector. Weir's result that, for flat space, there are 84 independent conformal Killing tensors, all of which are reducible, is extended to conformally flat spacetimes. In conformally flat spacetimes it is thus possible to construct all the conformal Killing tensors and in particular all the Killing tensors (which in general will not be reducible) from conformal Killing vectors.

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