Energy and Momentum Distributions of a (2+1)-dimensional black hole background

Details Energy and Momentum Distributions of a (2+1)-dimensional black hole background Energy and Momentum Distributions of a (2+1)-dimensional black hole background

2003-07-17

arxiv.org/abs/hep-th/0307162v3

Int.J.Mod.Phys. A18 (2003) 5949-5963

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, LaTeX, v3: references added, to appear in Int.J.Mod.Phys.A

Scientific paper

10.1142/S0217751X03016823

Using Einstein, Landau-Lifshitz, Papapetrou and Weinberg energy-momentum complexes we explicitly evaluate the energy and momentum distributions associated with a non-static and circularly symmetric three-dimensional spacetime. The gravitational background under study is an exact solution of the Einstein's equations in the presence of a cosmological constant and a null fluid. It can be regarded as the three-dimensional analogue of the Vaidya metric and represents a non-static spinless (2+1)-dimensional black hole with an outflux of null radiation. All four above-mentioned prescriptions give exactly the same energy and momentum distributions for the specific black hole background. Therefore, the results obtained here provide evidence in support of the claim that for a given gravitational background, different energy-momentum complexes can give identical results in three dimensions. Furthermore, in the limit of zero cosmological constant the results presented here reproduce the results obtained by Virbhadra who utilized the Landau-Lifshitz energy-momentum complex for the same (2+1)-dimensional black hole background in the absence of a cosmological constant.

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