期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 7, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2020/07/053
关键词
astrophysical black holes; GR black holes; modified gravity
资金
- DST INDO-SA bilateral project [DST/INT/South Africa/P06/2016]
- SERB-DST [IMRC/AISTDF/CRD/2018/000042]
- UGC
Recently there has been a surge of interest in regularizing, a D -> 4 limit of, the Einstein-Gauss-Bonnet (EGB) gravity, and the resulting regularized 4D EGB gravity has nontrivial dynamics. The theory admits spherically symmetric black holes generalizing the Schwarzschild black holes. We consider the rotating black hole in regularized 4D EGB gravity and discuss their horizon properties and shadow cast. The effects of the GB coupling parameter on the shape and size of shadows are investigated in the context of recent M87* observations from the EHT. Interestingly, for a given spin parameter, the apparent size of the shadow decreases and gets more distorted due to the GB coupling parameter. We find that within the finite parameter space, e.g. for a = 0.1M, alpha <= 0.00394M(2), and within the current observational uncertainties, the rotating black holes of the 4D EGB gravity are consistent with the inferred features of M87* black hole shadow.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据