Weak gravitational lensing by Kerr-MOG black hole and Gauss-Bonnet theorem

被引：59

作者：

Ovgun, Ali ^{[1
,2
]}

Sakalli, Izzet ^{[2
]}

Saavedra, Joel ^{[1
]}

机构：

[1] Pontificia Univ Catolica Valparaiso, Inst Fis, Casilla 4950, Valparaiso, Chile

[2] Eastern Mediterranean Univ, Arts & Sci Fac, Dept Phys, Via Mersin 10, Famagusta, North Cyprus, Turkey

来源：

ANNALS OF PHYSICS | 2019年 / 411卷

关键词：

Light deflection; Gauss-Bonnet theorem; Gravitational lensing; Black hole; MODIFIED GRAVITY; FIELD;

D O I：

10.1016/j.aop.2019.167978

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The deflection angle of Kerr-MOG black holes is studied for different values of the parameter in modified gravity (MOG). To this end, we employ the Gauss-Bonnet theorem, which was first studied by Gibbons and Werner and then extended by Ono, lshihara and Asada, who use a generalized optical metric where the deflection of light for an observer and source at finite distance. By using this method, we study the weak gravitational lensing by Kerr-MOG black hole. Our computations show that with an increase in the MOG parameter (alpha), the deflection angle becomes significantly larger than that of Kerr black hole. The results obtained show that MOG effect could be taken into account in the gravitational lensing experiments. (C) 2019 Elsevier Inc. All rights reserved.

引用

页数：10

共 67 条

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