preprints.org > physical sciences > astronomy and astrophysics > doi: 10.20944/preprints202109.0354.v2 (registering DOI)

Preprint Article Version 2 This version is not peer-reviewed

Version 1 : Received: 18 September 2021 / Approved: 21 September 2021 / Online: 21 September 2021 (09:45:58 CEST)
Version 2 : Received: 11 July 2024 / Approved: 12 July 2024 / Online: 12 July 2024 (13:41:34 CEST)

Although some alternative metrics have been proposed in classical gravity, the singularity problem remains unresolved perfectly. To satisfy the super-gravitational requirement of a black hole without singularities, we propose some possible finite-size structure to avoid the confused one. In this research, the degenerate Fermi electron gas is first used to reveal that the Fermi electron gas cannot shrink to a point regardless of how much energy it obtains; therefore, the singularity existing at the center becomes very unreasonable. To avoid these problems, a finite-size nucleus of the black hole is proposed and explained by the behaviors of the Fermi electron gas and Fermi neutron gas for this finite-size nuclear model. We construct the Kerr-Newman black hole by using a non-rotating but charged finite-size nucleus, a compact-like star, which is surrounded by counter-rotating and corotating electrons. Based on this model, the super-gravity the same as the one from a black hole is presented, and the speed of light observed at far-away places can be nonzero at the event horizon.

black hole; Schwarzschild radius; Kerr-Newman metric; geodesic; finite-size nuclear structure

Physical Sciences, Astronomy and Astrophysics

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