论文标题
Simpson-visser黑手射线时段中的重力镜头在很强的挠度极限下
Gravitational lensing in the Simpson-Visser black-bounce spacetime in a strong deflection limit
论文作者
论文摘要
Simpson-visser时空有两个非负参数$ a $ a $ a $ a $ a $ a $ a $，其度量与（i）schwarzschild公制$ a = 0 $ = 0 $ and = 0 $ and $ m \ neq0 $，（ii）一个普通的黑洞公制，$ a <2m $ a <2m $，（iii）的$ a-able-a travers a $ a $ a $ a $ a $ a。 $ a> 200万美元的虫洞度量，（v）Ellis-Bronnikov蠕虫孔公制，用于$ a \ neq0 $和$ m = 0 $。时空是最有用的空间之一，目的是全面理解由黑洞和虫洞的光子球反射的光线的重力镜头。我们已经在所有非负参数的$ a $ a $ a和$ m $的所有非负参数中，调查了Simpson-Visser时空的重力镜头。在$ a = 3M $的情况下，喉咙的两个光子球和一个抗thoton球变成边缘不稳定的光子球。光线的挠度角反射到喉咙处的边缘不稳定的光子球在强偏转极限下非同源物的差异。
A Simpson-Visser spacetime has two nonnegative parameters $a$ and $m$ and its metric is correspond with (i) a Schwarzschild metric for $a=0$ and $m\neq0$, (ii) a regular black hole metric for $a<2m$, (iii) a one-way traversable wormhole metric for $a=2m$, (vi) a two-way traversable wormhole metric for $a>2m$, and (v) an Ellis-Bronnikov wormhole metric for $a\neq0$ and $m=0$. The spacetime is one of the most useful spacetimes for the purpose of comprehensively understanding gravitational lensing of light rays reflected by a photon sphere of black holes and wormholes. We have investigated gravitational lensing in the Simpson-Visser spacetime in a strong deflection limit in all the nonnegative parameters of $a$ and $m$. In a case of $a=3m$, two photon spheres and an antiphoton sphere at the throat degenerate into a marginally unstable photon sphere. The deflection angle of the light rays reflected by the marginally unstable photon sphere at the throat diverges nonlogarithmically in the strong deflection limit.
