Energy Extraction from Higher Dimensional Black Holes and Black Rings

Details Energy Extraction from Higher Dimensional Black Holes and Black Rings Energy Extraction from Higher Dimensional Black Holes and Black Rings

2005-02-18

arxiv.org/abs/hep-th/0502166v1

Phys.Rev.D71:084028,2005

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 7 figures

Scientific paper

10.1103/PhysRevD.71.084028

We analyze the energy extraction by the Penrose process in higher dimensions. Our result shows the efficiency of the process from higher dimensional black holes and black rings can be rather high compared with than that in four dimensional Kerr black hole. In particular, if one rotation parameter vanishes, the maximum efficiency becomes infinitely large because the angular momentum is not bounded from above. We also apply a catastrophe theory to analyze the stability of black rings. It indicates a branch of black rings with higher rotational energy is unstable, which should be a different type of instability from the Gregory-Laflamme's one.

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