Energy extraction from a Konoplya–Zhidenko rotating non-Kerr black hole

2017/07/11 by Fen Long, Songbai Chen, Shangyun Wang +1
Mathematics · Physics and Astronomy · #Angular momentum #Astrophysical Phenomena and Observations #Black Holes and Theoretical Physics #Black hole (networking) #Classical mechanics #Deformation (meteorology) #Energy (signal processing) #Geometry #Mathematics #Penrose process #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Rotating black hole #Rotation (mathematics) #Rotational energy #Spacetime #de Sitter–Schwarzschild metric #gr-qc

paper · pdf · doi:10.1016/j.nuclphysb.2017.10.028

published as Nucl. Phys. B 926 (2018) 83-94 · 14 pages, 6 figures

arxiv created 2017/07/11 · openalex publication_date 2017/11/06 · arxiv updated 2017/11/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We have investigated the properties of the ergosphere and the energy extraction by Penrose process in a Konoplya–Zhidenko rotating non-Kerr black hole spacetime. We find that the ergosphere becomes thin and the maximum efficiency of energy extraction decreases as the deformation parameter increases. For the case with a < M , the positive deformation parameter yields that the maximum efficiency is lower than that in the Kerr black hole with the same rotation parameter. However, for the superspinning case with a > M , we find that the maximum efficiency can reach so high that it is almost unlimited as the positive deformation parameter is close to zero, which is a new feature of energy extraction in such kind of rotating non-Kerr black hole spacetime.

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