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Accretion Disk for regular black holes with sub-Planckian curvature

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arxiv 2308.00976 v1 pith:MDAQTOPX submitted 2023-08-02 gr-qc

Wei Zeng , Yi Ling , Qing-Quan Jiang , Guo-Ping Li This is my paper · ORCID
classification gr-qc
keywords blackaccretiondiskholescoreemissionregularrings
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We investigate the accretion disk for a sort of regular black holes which are characterized by sub-Planckian curvature and Minkowskian core. We derive null geodesics outside the horizon of such regular black holes and analyze the feature of the light rays from the accretion disk which can be classified into direct emission, lensed rings, and photon rings. We find that the observed brightness under different emission models is mainly determined by direct emission, while the contribution from the flux of the lensed and photon rings is limited. By comparing with Bardeen black hole with a dS core, it is found that the black hole with a Minkowskian core exhibits distinct astronomical optical features when surrounded by accretion disk, which potentially provides a way to distinguish these two sorts of black holes by astronomical observation.

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Cited by 3 Pith papers

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

  1. Anisotropic gravastar as horizonless regular black hole spacetime and its images illuminated by thin accretion disk

    gr-qc 2024-11 conditional novelty 6.0 of 10

    The authors build an anisotropic gravastar model whose pressure profile and cut-off make it interpolate between a Hayward regular black hole and a horizonless ultracompact star, then compute shadow images for two accr...

  2. Photon Propagation and Black Hole Imaging in Kruglov Nonlinear Electrodynamics

    gr-qc 2026-04 unverdicted novelty 5.0 of 10

    In Kruglov's Born-Infeld-type nonlinear electrodynamics, the effective photon geometry around a charged black hole produces q-dependent shifts in light deflection, shadow radius, and accretion disk images, including s...

  3. Shadows and accretion disk images of charged rotating black hole in modified gravity theory

    gr-qc 2024-11 conditional novelty 4.0 of 10

    Ray-traced images of the Kerr-Newman-MOG black hole show that the MOG parameter α enlarges and rounds the shadow, and its effect beats that of the electric charge Q.

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