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arXiv 2008.05845gr-qc
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等离子体存在下Kerr-Newman时空的光学性质

Optical properties of Kerr-Newman spacetime in the presence of plasma

Gulmina Zaman Babar, Abdullah Zaman Babar, Farruh Atamurotov

摘要:

用Hamilton-Jacobi方法研究了等离子体介质遮蔽下的Kerr-Newman黑洞背景中的零测地线。研究了黑洞的电荷和等离子体参数对有效势和普适光子轨道的影响。此外,我们还讨论了黑洞的电荷、等离子体和倾斜角对引力阴影的影响。我们研究了黑洞由于热辐射而释放的能量,这完全取决于阴影的大小。在弱场近似下,讨论了无质量粒子的偏转角,并将结果与广义相对论中的类似黑洞,特别是Schwarzschild和Kerr黑洞进行了比较.

英文摘要:

We have studied the null geodesics in the background of the Kerr-Newman black hole veiled by a plasma medium using the Hamilton-Jacobi method. The in uence of black hole's charge and plasma parameters on the effective potential and the generic photon orbits has been investigated. Furthermore, our discussion embodies the effects of black hole's charge, plasma and the inclination angle on the shadow cast by the gravity with and without the spin parameter. We examined the energy released from the black hole as a result of the thermal radiations, which exclusively depends on the size of the shadow. The angle of de ection of the massless particles is also explored considering a weak-field approximation.We present our results in juxtaposition to the analogous black holes in General Relativity, particularly the Schwarzschild and Kerr black hole.

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