Shadow of a charged rotating black hole in f(R) gravity
Shadow of a charged rotating black hole in f(R) gravity
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DOI：
10.1140/epjp/s13360-022-03218-0
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发表时间：
2016-06
期刊：
影响因子：
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通讯作者：
S. Dastan;R. Saffari;S. Soroushfar
中科院分区：
文献类型：
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作者：
S. Dastan;R. Saffari;S. Soroushfar
一个带电荷的旋转黑洞引力为(R)，其特征是质量、M、自旋、A、电荷Q和与宇宙常数成正比。我们分析了四种类型的黑洞阴影图像(1)在，(2)在真空中，(3)在和(4)在等离子体存在时的观察者。此外，我们还研究了自旋、电荷和重力变化对阴影形状的影响。此外，我们使用两个可观测参数，即半径和畸变参数来表征表观形状。我们表明，在所有情况下，随着电荷的增加，阴影变小。此外，通过增加旋转参数，黑洞阴影图像的圆形对称性将会改变。此外，在等离子体存在的情况下，等离子体参数也会影响阴影的大小。
A charged rotating black hole inf(R) gravity is characterized by mass,M, spin,a, electric charge,Q, andwhich is proportional to cosmological constant. We analyze the image of the black hole shadow in four types (1) at, (2) atin vacuum, (3) atand (4) atfor an observer at the presence of plasma. Moreover, we investigate the effect of spin, charge, and modification of gravity on the shape of the shadow. In addition, we use two observable parameters, the radiusand the distortion parameter, characterizing the apparent shape. We show that the shadow becomes smaller with increasing electric charge for all cases. Also, by increasing the rotation parameters, the circular symmetry of the black hole’s shadow image will change. Furthermore, in the presence of plasma, the plasma parameter also affects the size of the shadow.