Circular motion and particle collisions in ergoregion of rotating and twisting charged black holes

被引：2

作者：

Khan, Saeed Ullah ^{[1
]}

Chen, Zhi-Min ^{[1
]}

机构：

[1] Shenzhen Univ, Sch Math Sci, Shenzhen 518060, Peoples R China

来源：

CHINESE JOURNAL OF PHYSICS | 2024年 / 92卷

关键词：

Black holes; Photon region; Could of strings; Quintessential field; NUT charge; PENROSE PROCESS; GRAVITATIONAL-FIELD; DYNAMICS; EXTRACTION; ENERGY; QUINTESSENCE; ACCRETION; SPACETIME; STRINGS; MATTER;

D O I：

10.1016/j.cjph.2024.11.001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The presence of clouds of strings, quintessential fields, and NUT charges has significant consequences for spacetime geometry, and their study is much more important from an observational and theoretical perspective. Hence, in this article, we aim to explore the rotating and twisting charged black holes with the cloud of strings and quintessential field through horizons, ergoregions, photon regions, circular motion, and energy efficiency. First, we derive the equation of motion and the expressions for studying the photon region. To investigate circular motion, we derive the mathematical expressions of energy and angular momentum. The cloud of stings reduces the stability of angular momentum and energy in prograde particle motions and shifts their minima from the black hole's center to the right. Static black holes with clouds of strings have the greatest angular momentum in prograde orbital motion, while rotating ones without clouds of strings have the least. Furthermore, we examine the efficiency of energy extraction through the Penrose process. The known energy extraction efficiency of the Penrose process for an extreme Kerr black hole is about 21%, but in the presence of clouds of strings, it exceeds 100%.

引用

页码：1659 / 1673

页数：15

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