In this paper, we study some features of the Kerr metric both from an analytic and a visual point of view by performing accurate raytracing in various situations. We focus on features that are unique to the maximal analytic extension of the Kerr metric as compared to that of the Schwarzschild or even the Reissner–Nordström one. A large number of new, yet underexplored phenomena appear, especially regarding the structure of bounded null geodesics and the aspect of the negative gravity regions whose visual characteristics are shown both from outside and inside it.

中文翻译：

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看到相对论 - III。在 Kerr 度量内向负重力区域行进

在本文中，我们通过在各种情况下执行准确的光线追踪，从分析和视觉的角度研究了 Kerr 度量的一些特征。与 Schwarzschild 甚至 Reissner-Nordström 度量相比，我们专注于 Kerr 度量的最大分析扩展所独有的特征。出现了大量新的但未被充分探索的现象，特别是关于有界零测地线的结构和负重力区域的方面，其视觉特征从外部和内部都显示出来。