Orbital motion of test particles in regular Hayward black hole space–time

Hu, Jian-Ping

doi:10.1139/cjp-2018-0031

Cited by 7 publications

(3 citation statements)

References 36 publications

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“…As we have seen explicitly in Section 5.3, the quasistatic approximation is reliable as long as the semiclassical one is valid. In a first approximation, therefore, we can use the time variation of the event horizon r H = r H (t), computed as a solution of the SB law (45), and plug it into the expression of the surface gravity…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The latter also produces an additional hair , which could have interesting observational signatures in the geodesics motion of massless and massive particles, quasinormal modes spectrum and gravitational waves (see, e.g., Refs. [23,30,[45][46][47][48] and references therein). Another consequence of the dS core is the presence, depending on the value of , of two horizons and an extremal solution.…”

Section: Introductionmentioning

confidence: 99%

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Effective models of nonsingular quantum black holes

Cadoni

Sanna

2022

Phys. Rev. D

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effective models of nonsingular quantum black holes

Cadoni

Sanna

2022

Phys. Rev. D

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“…Previously, this analysis has been successively applied on Schwarzschild [39] to describe its relativistic orbits. The relativistic orbits of stingy black holes [40] and regular Hayward black holes [41] have also been discussed by following the same phase-plane analysis. Inspired with the previous works on this topic so far, we are going to construct the relativistic orbits of the test particle in the gravitational field of Reissner-Nordström (RN) type regular black hole.…”

Section: Introductionmentioning

confidence: 99%

Phase-plane analysis of test particle orbits in regular black holes

Amir¹

2020

Commun. Theor. Phys.

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We investigate phase-plane analysis of general relativistic orbits in a gravitational field of the Reissner–Nordström-type regular black hole spacetime. We employ phase-plane analysis to obtain different phase-plane diagrams of the test particle orbits by varying charge q and dimensionless parameter β, where β contains angular momentum of the test particle. We compute numerical values of radii for the innermost stable orbits and corresponding values of energy required to place the test particle in orbits. Later on, we employ similar analysis on an Ayón–Beato–García (ABG) regular black hole and a comparison regarding key results is also included.

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Evaporation and information puzzle for 2D nonsingular asymptotically flat black holes

Cadoni

Sanna

2023

J. High Energ. Phys.

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We investigate the thermodynamics and the classical and semiclassical dynamics of two-dimensional (2D), asymptotically flat, nonsingular dilatonic black holes. They are characterized by a de Sitter core, allowing for the smearing of the classical singularity, and by the presence of two horizons with a related extremal configuration. For concreteness, we focus on a 2D version of the Hayward black hole. We find a second order thermodynamic phase transition, separating large unstable black holes from stable configurations close to extremality. We first describe the black-hole evaporation process using a quasistatic approximation and we show that it ends in the extremal configuration in an infinite amount of time. We go beyond the quasistatic approximation by numerically integrating the field equations for 2D dilaton gravity coupled to N massless scalar fields, describing the radiation. We find that the inclusion of large backreaction effects (N ≫ 1) allows for an end-point extremal configuration after a finite evaporation time. Finally, we evaluate the entanglement entropy (EE) of the radiation in the quasistatic approximation and construct the relative Page curve. We find that the EE initially grows, reaches a maximum and then goes down towards zero, in agreement with previous results in the literature. Despite the breakdown of the semiclassical approximation prevents the description of the evaporation process near extremality, we have a clear indication that the end point of the evaporation is a regular, extremal state with vanishing EE of the radiation. This suggests that the nonunitary evolution, which commonly characterizes the evaporation of singular black holes, could be traced back to the presence of the singularity.

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Orbital motion of test particles in regular Hayward black hole space–time

Cited by 7 publications

References 36 publications

Effective models of nonsingular quantum black holes

Effective models of nonsingular quantum black holes

Phase-plane analysis of test particle orbits in regular black holes

Evaporation and information puzzle for 2D nonsingular asymptotically flat black holes

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