论文标题
围绕Kerr-Newman黑洞的多层次图像
Multi-level images around Kerr-Newman black holes
论文作者
论文摘要
我们研究了Kerr-Newman（KN）黑洞的镜头效应以及黑洞周围发光源的多层次图像。我们在kN时段中获得了镜头方程的分析形式，并在有界光子轨道附近的光子排放中大致得出了它们的限制形式。在得出三个关键参数$γ$，$δ$和$τ$的表达式之后，我们研究了球形源和赤道磁盘样源的主要，次级和高阶图像。特别是，我们发现kN黑洞的电荷对高阶图像具有显着影响。
We study the lensing effects of Kerr-Newman (KN) black holes and the multi-level images of luminous sources around the black holes. We obtain the analytic forms of the lens equations in KN spacetime and derive approximately their limiting forms for photon emissions near the bounded photon orbits. After deriving the expressions of three key parameters $γ$, $δ$ and $τ$, we investigate the primary, the secondary and the higher-order images of spherical sources and equatorial disk-like sources. In particular, we find that the charge of KN black hole has a significant effect on the higher-order images.
