https://doi.org/10.1140/epjc/s10052-022-10476-w
Regular Article - Theoretical Physics
Revisiting superradiant stability of Kerr–Newman black holes under a charged massive scalar
1
Institute of Basic Sciences and Department of Computer Simulation, Inje University Gimhae, 50834, Gimhae, Korea
2
Asia Pacific Center for Theoretical Physics, 37673, Pohang, Korea
Received:
18
January
2022
Accepted:
30
May
2022
Published online:
9
June
2022
We revisit the superradiant stability of Kerr–Newman black holes under a charged massive scalar perturbation. We obtain a newly suitable potential which is not singular at the outer horizon when a radial equation is expressed the Schrödinger-type equation in terms of the tortoise coordinate. From the potential analysis, we find a condition for the superradiant stability of Kerr–Newman black holes.
© The Author(s) 2022
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