论文标题
与非线性电动力学旋转黑洞的光学特征
Optical Features of Rotating Black Hole with Nonlinear Electrodynamics
论文作者
论文摘要
在本文中，我们考虑了非线性电动力学黑洞的强场近似，并通过应用改良的Newman-Janis算法来构建其旋转对应物。为了研究光子球的半径，确定了静态黑洞的强场极限中的相应度量函数。但是，为了研究Horizon Radius W.R.T旋转参数，考虑了强场限制中旋转对应物的度量函数。我们考虑了汉密尔顿 - 雅各比的方法，用于推导光子的测量方程，并构建了一个正顺序的四个，用于得出观察者天空中天体坐标的方程。研究了阴影，扭曲和能量排放速率，并比较非线性电动力学参数，电荷和自旋的不同值的结果。发现非线性电动力学参数的存在会影响阴影的形状和大小，从而影响旋转的情况下的失真。还发现，由于自旋和其他参数的影响，电动力学的非线性会降低阴影中的平坦度。
In this article, we considered the strong field approximation of nonlinear electrodynamics black hole and constructed its rotating counterpart by applying the modified Newman-Janis algorithm. The corresponding metric function in the strong field limit of the static black hole is identified in order to study the radius of photon sphere. However, the metric function for the rotating counterpart in the strong field limit is considered in order to study the horizon radius w.r.t spin parameter. We considered the Hamilton-Jacobi method to derive the geodesic equations for photon and constructed an orthonormal tetrad for deriving the equations for celestial coordinates in the observer's sky. Shadows, distortions and energy emission rates are investigated and the results are compared for different values of nonlinear electrodynamics parameter, charge and spin. It is found that the presence of the nonlinear electrodynamics parameter affects the shape and size of the shadows and thus the distortion in the case of rotation. It is also found that the nonlinearity of electrodynamics diminishes the flatness in the shadow due to the effect of spin and other parameters.
