论文标题
在强场限制中，reissner-nordström黑洞的无重力红移
Null Gravitational Redshift by a Reissner-Nordström Black Hole in the Strong Field Limit
论文作者
论文摘要
在公共场景下，电磁频率在强场极限中的重力移位通常在镜头中远离中央体内，而发射极处于镜头的强场区域。在本文中，在传统的强场场景中，以及在黑洞的强场地发生了光发射和接收事件的情况下，在传统的强场景中，在传统的强场景中，在数值上研究了由Reissner-Nordström（RN）黑洞引起的光的重力频移。为了获得重力红移的数值结果，我们首先得出了谐波坐标中RN几何形状中精确的NULL运动方程。对于给定的光观察者，考虑到它们的空间位置并不总是同时知道它们的空间位置，因此在集成地球方程的整合中提出了一种新的数值技术。我们的工作可能有助于探测强力的相关观察结果。
The gravitational shift of electromagnetic frequency in the strong field limit is usually investigated under the common scenario, where the light receiver is far away from the central body while the emitter is in the strong-field region of the lens. In this paper, the gravitational frequency shift of light caused by a Reissner-Nordström (RN) black hole is studied numerically in the traditional strong-field scenario, as well as in the scenario where both the light emission and reception events happen in the strong-field region of the black hole. In order to obtain the numerical results of the gravitational redshift, we first derive the exact null equations of motion in the RN geometry in harmonic coordinates. For a given light observer, a new numerical technique is proposed in the integration of the geodesic equations to determine the spatial position of the emitter, considering the fact that their spatial positions are not always known simultaneously. Our work might be helpful to the related observations for probing strong gravity.
