论文标题
Kerr-Newman Black-BONG SEPETIME中重力镜头的分析研究
Analytical study of gravitational lensing in Kerr-Newman black-bounce spacetime
论文作者
论文摘要
我们研究了在Kerr-Newman Black-Bounce时段传播的光线的赤道挠度角。此外，我们分析了灯光轨迹，并根据椭圆形积分得出偏转角的封闭式公式。特定冲击参数的电荷和正规化参数的减少和正则化参数的减小增加。我们还研究了挠度角的强场极限。使用这种强挠度角公式和镜头方程，我们找到了第一个爱因斯坦环的半径，并研究了其对电荷和正则化参数的依赖性。我们证明了电荷对爱因斯坦环的尺寸具有强大的影响，但是正则化参数对环大小的影响可以忽略不计。我们还研究了非赤道镜头和小极性倾斜度的苛性镜结构，并且似乎存在相同的观察结果。这些结果直接影响了Kerr-Newman Black Bounce的观察性外观。
We investigate the equatorial deflection angle of light rays propagating in Kerr-Newman black-bounce spacetime. Furthermore, we analyze the light ray trajectories and derive a closed-form formula for deflection angle in terms of elliptic integrals. The deflection angle increases with the decrease of charge and regularisation parameter for a particular impact parameter. We also study the strong field limit of the deflection angle. Using this strong deflection angle formula and lens equation, we find the radius of the first Einstein ring and study its dependence on the charge and the regularisation parameter. We demonstrate that the charge has a robust effect on the size of the Einstein rings, but the effect of the regularization parameter on the ring size is negligible. We also investigate the non-equatorial lensing and the caustic structures for small polar inclination, and the same observations appear to hold. These results directly affect the observational appearance of the Kerr-Newman black-bounce.
