Rotating charged black hole in 4D Einstein-Gauss-Bonnet gravity: Photon motion and its shadow

被引：42
|
作者：
Papnoi, Uma [1 ,2 ]
Atamurotov, Farruh [3 ,4 ,5 ,6 ]
机构：
[1] Gurukul Kangri Deemed Univ, Haridwar 249404, Uttarakhand, India
[2] Kanoria PG Mahila Mahavidyalaya, Jaipur 302004, Rajasthan, India
[3] Inha Univ Tashkent, Ziyolilar 9, Tashkent 100170, Uzbekistan
[4] Akfa Univ, Kichik Halqa Yuli St 17, Tashkent 100095, Uzbekistan
[5] Natl Univ Uzbekistan, Dept Astron & Astrophys, Tashkent 100174, Uzbekistan
[6] Inst Nucl Phys, Tashkent 100214, Uzbekistan
来源：
PHYSICS OF THE DARK UNIVERSE | 2022年 / 35卷
关键词：
Einstein-Gauss-Bonnet gravity; Shadow; Modified gravity;
D O I：
10.1016/j.dark.2021.100916
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We construct a charged rotating black hole in 4D Einstein-Gauss-Bonnet (EGB) gravity starting from charged black hole in 4D EGB gravity using complex coordinate transformations suggested by Newman-Janis. Further, we have studied the null geodesics to investigate the shape of the shadow cast by a rotating charged black hole in 4D EGB gravity. Also we have discussed their horizon properties and shadow cast. The phenomenon of black hole shadows alongwith the horizon structure and energy emission has been analyzed to see the influence of Gauss-Bonnet term and black hole charge on horizon, shadow, effective potential and energy emission rate which are compared to their non rotating counterpart. It has been seen that the Gauss-Bonnet parameter have an influence on the shape and size of the shadow as well as on the effective potential, horizon and energy emission rate. (C) 2021 Elsevier B.V. All rights reserved.
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页数：12
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