A Visualization of Null Geodesics for the Bonnor Massive Dipole

Null limits of generalised Bonnor-Swaminarayan solutions

The Bonnor-Swaminarayan solutions are boost-rotation symmetric space-times which describe the motion of pairs of accelerating particles which are possibly connected to strings (struts). In an explicit and unified form we present a generalised class of such solutions with a few new observations. We then investigate the possible limits in which the accelerations become unbounded. The resulting space-times represent spherical impulsive gravitational waves with snapping or expanding cosmic strings. We also obtain an exact solution for a snapping string of finite length.

Accelerated Born-Infeld Metrics in Kerr-Schild Geometry

We consider Einstein Born-Infeld theory with a null fluid in Kerr-Schild Geometry. We find accelerated charge solutions of this theory. Our solutions reduce to the Plebanski solution when the acceleration vanishes and to the Bonnor-Vaidya solution as the Born-Infeld parameter b goes to infinity. We also give the explicit form of the energy flux formula due to the acceleration of the charged sources.

学习广义相对论中用于引力透镜渲染的零测地线

Learning Null Geodesics for Gravitational Lensing Rendering in General Relativity

本文提出GravLensX方法，利用神经网络拟合黑洞周围时空并生成引力透镜光线路径，实现高效可扩展的黑洞渲染，计算时间减少15倍，为天文可视化开辟新途径。