Ergosphere, Photon Region Structure, and the Shadow of a Rotating Charged Weyl Black Hole

被引：13
作者：
Fathi, Mohsen [1 ]
Olivares, Marco [2 ]
Villanueva, Jose R. [1 ]
机构：
[1] Univ Valparaiso, Inst Fis & Astron, Ave Gran Bretana 1111, Valparaiso 2340000, Chile
[2] Univ Diego Portales, Fac Ingn & Ciencias, Ave Ejercito Libertador 441,Casilla 298-5, Santiago 8370109, Chile
来源：
GALAXIES | 2021年 / 9卷 / 02期
关键词：
Weyl gravity; black hole shadow; ergosphere; CONFORMAL GRAVITY; GRAVITATIONAL-WAVES; OPTICAL APPEARANCE; GENERAL-RELATIVITY; LIGHT DEFLECTION; DARK-MATTER; KERR; TESTS; COSMOLOGY; GALAXIES;
D O I：
10.3390/galaxies9020043
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this paper, we explore the photon region and the shadow of the rotating counterpart of a static charged Weyl black hole, which has been previously discussed according to null and time-like geodesics. The rotating black hole shows strong sensitivity to the electric charge and the spin parameter, and its shadow changes from being oblate to being sharp by increasing in the spin parameter. Comparing the calculated vertical angular diameter of the shadow with that of M87*, we found that the latter may possess about 1036 protons as its source of electric charge, if it is a rotating charged Weyl black hole. A complete derivation of the ergosphere and the static limit is also presented.
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页数：26
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