Repulsive gravity is a well known characteristic of naked singularities. In this work, we explore light surfaces and find new effects of repulsive gravity. We compare Kerr naked singularities with the corresponding black hole counterparts and find certain structures that are identified as horizon remnants. We argue that these features might be significant for the comprehension of processes that lead to the formation or eventually destruction of black hole Killing horizons. These features can be detected by observing photon orbits, particularly close to the rotation axis, which can be used to distinguish naked singularities from black holes.

中文翻译：

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地平层形成中的排斥重力效应

排斥引力是裸奇点的一个众所周知的特征。在这项工作中，我们探索了轻质表面并发现了排斥引力的新效应。我们将克尔裸奇点与相应的黑洞对应物进行比较，并发现某些被确定为视界遗迹的结构。我们认为，这些特征可能对于理解导致黑洞杀戮视界形成或最终毁灭的过程具有重要意义。这些特征可以通过观察光子轨道来检测，特别是靠近旋转轴的轨道，可以用来区分裸奇点和黑洞。