ROTATING NON-KERR BLACK HOLE AND ENERGY EXTRACTION

被引：26

作者：

Liu, Changqing ^{[1
,2
]}

Chen, Songbai ^{[1
]}

Jing, Jiliang ^{[1
]}

机构：

[1] Hunan Normal Univ, Dept Phys, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China

[2] Hunan Inst Human Sci & Technol, Dept Phys & Informat Engn, Loudi 417000, Hunan, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 751卷 / 02期

基金：

中国国家自然科学基金;

关键词：

black hole physics; gravitation; HAIR THEOREM; GRAVITATIONAL-WAVES; MASSIVE BODY;

D O I：

10.1088/0004-637X/751/2/148

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The properties of the ergosphere and energy extraction by the Penrose process in a rotating non-Kerr black hole are investigated. It is shown that the ergosphere is sensitive to the deformation parameter epsilon and the shape of the ergosphere becomes thick as parameter epsilon increases. It is of interest to note that, compared with the Kerr black hole, the deformation parameter epsilon can enhance the maximum efficiency of the energy extraction process greatly. Especially for the case of a > M, the non-Kerr metric describes a superspinning compact object and the maximum efficiency can exceed 60%, while it is only 20.7% for the extremal Kerr black hole.

引用

页数：7

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