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An upper bound on the minimum orbital period of black holes

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arxiv 2504.09061 v1 pith:Q2HHNDI3 submitted 2025-04-12 gr-qc

classification gr-qc
keywords blackholesminimumorbitalperiodupperboundhole
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abstract

Previous research has focused on establishing lower bounds on the minimum orbital period of black holes. In this work, we explore the complementary question of whether an upper bound exists for the minimum orbital period of black holes. We investigate the minimum orbital periods of three types of black holes: Schwarzschild, Reissner-Nordstr\"{o}m and Kerr-Newman black holes. We find that the minimum orbital period of these black holes is bounded by an upper limit $T_{min} \leqslant 6\sqrt{3}\pi M$, where $M$ is the black hole mass. Our results suggest that this upper bound on the minimum orbital period may be a general property in black hole spacetimes.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Bounds on the minimum orbital period in the background of 5-dimensional charged black holes

    gr-qc 2025-06 conditional novelty 4.0 of 10

    For 5D charged black holes, the minimum orbital period lies between 6√π√M and 8√(6π)/3√M, with the bounds reached at maximal and zero charge.

  2. Bounds on the minimum orbital periods of non-singular Hayward and Bardeen black holes

    gr-qc 2025-05 conditional novelty 4.0 of 10

    The minimum orbital period of circular lightlike orbits around Hayward and Bardeen regular black holes satisfies the conjectured bounds, supporting the horizon's role over the singularity.

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