Modified regular black holes with time delay and 1-loop quantum correction *

Ling, Yi 凌意; Wu, Meng-He

doi:10.1088/1674-1137/ac3643

Cited by 7 publications

(11 citation statements)

References 30 publications

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“…Taking the quantum effects of gravity into account, it is believed that these singularities could be removed or avoided. Before a well-defined theory of quantum gravity could be established, people have constructed various regular black holes without singularity at the phenomenological level [27][28][29][30][31][32][33]. These regular black hole models are characterized by a finite Kretschmann scalar curvature.…”

Section: Introductionmentioning

confidence: 99%

The shadow of regular black holes with asymptotically Minkowski core

Liu¹,

Wu²

2022

Preprint

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We investigate the shadow cast by a sort of new regular black holes which are characterized by an asymptotically Minkowski core and the Sub-Planckian curvature. Firstly, we extend the metric with spherical symmetry to the one of rotating Kerr-like black holes and derive the null geodesics with circular orbit near the horizon of the black hole, and then plot the shadow of black holes with different values of the deviation parameter. It is found that the size of the shadow shrinks with the increase of the deviation parameter, while the shape of the shadow becomes more deformed. In particular, by comparing with the shadow of Bardeen black hole and Hayward black hole with the same values of parameters, we find that in general the shadow of black holes with Minkowski core has a larger deformation than that with de Sitter core, which potentially provides a strategy to distinguish these two sorts of regular black holes with different cores by astronomical observation in future.

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Section: Introductionmentioning

confidence: 99%

The shadow of regular black holes with asymptotically Minkowski core

Liu¹,

Wu²

2022

Preprint

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“…In Ref. [36], a new type of regular black hole with sub-Planckian Kretschmann scalar curvature was proposed with the following metric:…”

Section: Curvaturementioning

confidence: 99%

“…Obviously, when , it returns to the standard Schwarzschild black hole. The metric of this type of regular black hole was originally proposed in [36] based on the motivation that the GUP may introduce the effects of tidal force on any object with finite size bounded below by the minimal length [12,47]. In this sense, the dimensionless parameter arises from the quantum effects of gravity and characterizes the modification of the standard Heisenberg uncertainty principle due to quantum gravity 1) .…”

Section: Curvaturementioning

confidence: 99%

“…The quantum effects of gravity alter the classical geometry of a black hole such that it stops evaporating at a certain scale and leaves behind a black hole remnant. Going further, a new type of regular black hole was proposed in [12] and [36]. In comparison with the well-known Bardeen/Hayward/Frolov black holes, which are characterized by the de-Sitter core at the center, this new type of black hole has an exponentially suppressed Newton potential and is characterized by a Minkowski core at the center.…”

Section: Introductionmentioning

confidence: 99%

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Astrophysical observables for regular black holes with sub-Planckian curvature*

Zeng¹,

Ling

Jiang

2023

Chinese Phys. C

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We investigate the photon sphere and the marginally stable circular orbit for massive particles over a recently proposed regular black holes with sub-Planckian curvature and Minkowskian core. We derive the effective potential for geodesic orbits and determine the radius of circular photon orbits, with an analysis on the stability of these orbits. We extend our analysis to the background of compact massive object (CMO) without horizon, whose mass is below the lowest bound for the formation of a black hole. For massive particles, marginally stable circular orbit become double-valued in CMO phase. By comparing wih Bardeen black hole and Hayward black hole, it is also found that the locations of photon sphere and marginally stable circular orbit in CMO phase with Minkowskian core are evidently different from the ones in CMO phase with dS core, which potentially provides a way to distinguish these two sorts of black holes by astronomical observation. Finally, we provide the observational constraint on the deviation parameter for such regular black holes by the observed data from black hole M87*.

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“…In addition, the connection between regular black holes with asymptotically dS core and those with asymptotically Minkowskian core has been disclosed in [30]. Recently, more features of this sort of black holes have been investigated in [36,37].…”

Section: Introductionmentioning

confidence: 99%

Astrophysical observables for regular black holes with sub-Planckian curvature

Zeng¹,

Liu²,

Jiang³

2022

Preprint

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We investigate the photon sphere and the extremal stable circular orbit (ESCO) for massive particles over a recently proposed regular black holes with sub-Planckian curvature and Minkowskian core. We derive the effective potential for geodesic orbits and determine the radius of circular photon orbits, with an analysis on the stability of these orbits. We extend our analysis to the background of compact massive object (CMO) without horizon, whose mass is below the lowest bound for the formation of a black hole. For massive particles, the ESCOs become double-valued in CMO phase and we calculate the innermost stable circular orbits (ISCO) and the outermost stable circular orbits (OSCO). By comparing wih Bardeen black hole and Hayward black hole, it is also found that the locations of photon sphere and ESCO in CMO phase with Minkowskian core are evidently different from the ones in CMO phase with dS core, which potentially provides a way to distinguish these two sorts of black holes by astronomical observation.

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Modified regular black holes with time delay and 1-loop quantum correction *

Cited by 7 publications

References 30 publications

The shadow of regular black holes with asymptotically Minkowski core

The shadow of regular black holes with asymptotically Minkowski core

Astrophysical observables for regular black holes with sub-Planckian curvature*

Astrophysical observables for regular black holes with sub-Planckian curvature

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