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Rotating non-Kerr black hole and energy extraction
Liu Changqing 1,Chen Songbai 1,Jing Jiliang 2 * #
1.Department of Physics, Hunan Normal University, ChangSha 410081
2.Department of Physics, Hunan Normal University, Changsha 410081
*Correspondence author
#Submitted by
Subject:
Funding: the SRFDP（No.NO.20114306110003）, Hunan Provincial Innovation Foundation For Postgraduate（No.NO.CX2011B185）, the National Natural Science Foundation of China（No.NO.11175065,10935013）
Opened online:27 April 2012
Accepted by: none
Citation: Liu Changqing,Chen Songbai,Jing Jiliang.Rotating non-Kerr black hole and energy extraction[OL]. [27 April 2012] http://en.paper.edu.cn/en_releasepaper/content/4475036
 
 
The properties of the ergosphere region and theenergy extraction by Penrose process in a rotating non-Kerr blackhole are investigated. It is shown that the ergosphere region issensitive to the deformation parameter ε and the relativeshape of the ergosphere becomes thick with increase of the parameter ε. It is of interest to note that, comparing with the Kerrblack hole, the deformation parameter ε enhances themaximum efficiency of the energy extraction process. Especially, forthe case of a>M, the non-Kerr metric describes a superspinningcompact object and the maximum efficiency can exceed 60%, whileit is only 20.7% for the extremal Kerr black hole.
Keywords:Energy Extraction; Rotating non-Kerr black hole; Penrose process
 
 
 

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