论文标题
Kaluza-Klein黑洞的观察性外观
Observational appearance of Kaluza-Klein black holes
论文作者
论文摘要
详细研究了由总质量，自旋和电荷和磁性电荷描述的Kaluza-Klein理论中旋转黑洞的光学特性。使用开发的一般相对论射线追踪代码来计算光子的运动，生成了Kaluza-Klein黑洞的众多阴影。还研究了黑洞阴影的特性和这些黑洞周围的光挠度角，以便使用M87*阴影观测来对Kaluza-Klein黑洞的参数进行约束。研究了使用阴影观察对Kaluza-Klein黑洞施加约束的可能性。此外，我们发现黑洞的小电荷（电和磁）可以满足这些约束。我们得出的结论是，通过M87*黑洞阴影图像观察的当前精度，Kaluza-Klein黑洞的阴影观察与Kerr Black Hole的阴影观察是无法区分的。比EHT协作的当前功能要比当前的能力要好得多，以便在强场策略中对修改后的重力理论的参数进行验证的约束。
The optical properties of rotating black holes in Kaluza-Klein theory described by the total mass, spin, and electric and magnetic charges are investigated in detail. Using a developed general relativistic ray-tracing code to calculate the motion of photons, the numerous shadows of Kaluza-Klein black holes are generated. The properties of the black hole shadow and the light deflection angle around these black holes are also studied in order to put constraints on the parameters of Kaluza-Klein black holes using M87* shadow observations. The possibility of imposing constraints on Kaluza-Klein black holes using shadow observations is investigated. Moreover, we find that small charges (electric and magnetic) of the black hole can meet these constraints. We conclude that with the current precision of the M87* black hole shadow image observation by the EHT collaboration, the shadow observations of Kaluza-Klein black holes are indistinguishable from that of the Kerr black hole. Much better observational accuracy than the current capabilities of the EHT collaboration are required in order to place verified constraints on the parameters of modified theories of gravity in the strong field regime.
