期刊
PHYSICAL REVIEW D
卷 99, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.044015
关键词
-
资金
- Natural Sciences and Engineering Research Council of Canada
- National Natural Science Foundation of China [11805166]
The presence of dark matter around a black hole remarkably affects its spacetime. We consider the effects of dark matter on the shadow of a new solution to the Einstein equations that describes a rotating black hole in the background of perfect dark matter fluid, along with its extension to nonzero cosmological constant Lambda. Working in Boyer-Lindquist coordinates, we consider the effects of the perfect dark matter fluid parameter alpha on the shadow cast by a black hole with respect to an observer at position (r(0), theta(0)). By applying the Gauss-Bonnet theorem to the optical geometry, we find that notable distortions from a Kerr black hole can occur. We describe their dependence on alpha and Lambda.
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