Charged black-bounce spacetimes
arXiv:2104.11376 · doi:10.1088/1475-7516/2021/07/036
Abstract
Given the recent development of rotating black-bounce-Kerr spacetimes, for both theoretical and observational purposes it becomes interesting to see whether it might be possible to construct black-bounce variants of the entire Kerr-Newman family. Specifically, herein we shall consider black-bounce-Reissner-Nordström and black-bounce-Kerr-Newman spacetimes as particularly simple and clean everywhere-regular black hole "mimickers" that deviate from the Kerr-Newman family in a precisely controlled and minimal manner, and smoothly interpolate between regular black holes and traversable wormholes. While observationally the electric charges on astrophysical black holes are likely to be extremely low, , introducing any non-zero electric charge has a significant theoretical impact. In particular, we verify the existence of a Killing tensor (and associated Carter-like constant) but without the full Killing tower of principal tensor and Killing-Yano tensor, also we discuss how, assuming general relativity, the black-bounce-Kerr-Newman solution requires an interesting, non-trivial matter/energy content.
arXiv commentV1: 27 pages, 0 figures, 61 references. V2: Still 27 pages, 0 figures, no physics changes, 6 references added (now 67 references). V3: Published and final version, now 29 pages, 2 figures added, minor discussion added on page 17, 2 references added (now 69 references)
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