Late-time tails, entropy aspects, and stability of black holes with anisotropic fluids

Cuadros-Melgar, Bertha; Fontana, R. D. B.

doi:10.1140/epjc/s10052-020-8415-7

Cited by 12 publications

(6 citation statements)

References 55 publications

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“…in order to fulfill the null energy condition [34,35]. For this range of values the solutions (2) display a causal structure which is very similar to the Reissner-Nordström-de Sitter black hole, except for the light-like structure beyond the cosmological-like horizon (r > r c ) [33].…”

Section: Black Hole Solutionsmentioning

confidence: 92%

“…( 73) reduces to the usual equation for the anisotropic BH system with a massive scalar field evolving in the geometry (see e.g. [33]).…”

Section: Scalar Field Dynamics: Field Profile Instabilities and Quasi...mentioning

confidence: 99%

“…The question of its stability was studied in [28][29][30][31][32] and the QNMs spectrum due to massless scalar perturbations, the late-time tails structure, and some thermodynamical aspects were presented in [33].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Superradiance and instabilities in black holes surrounded by anisotropic fluids

Cuadros-Melgar,

Fontana,

de Oliveira

2021

Preprint

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In this paper we analyze the propagation of a charged scalar field in a Reissner-Nordström black hole endowed with one anisotropic fluid that can play the role of a cosmological term for certain set of parameters. The evolution of a scalar wave scattering is examined giving rise to the same superradiant scattering condition as in the de Sitter case. In addition, an analysis of the modes coming from the application of quasinormal boundary conditions is presented. Some special cases displaying analytical solutions for the quasinormal frequencies are discussed. Moreover, the superradiant condition is adapted to the quasinormal problem triggering unstable modes, what is confirmed by our numerical analysis.

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Section: Black Hole Solutionsmentioning

confidence: 92%

“…( 73) reduces to the usual equation for the anisotropic BH system with a massive scalar field evolving in the geometry (see e.g. [33]).…”

Section: Scalar Field Dynamics: Field Profile Instabilities and Quasi...mentioning

confidence: 99%

See 1 more Smart Citation

Superradiance and instabilities in black holes surrounded by anisotropic fluids

Cuadros-Melgar,

Fontana,

de Oliveira

2021

Preprint

Self Cite

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“…A thermodynamical system is said to be stable if T r(H) ≥ 0 [44]. Figure 10 shows the graphical analysis of Hessian trace in terms of r + for different values of correction parameter, coupling parameter and charge.…”

Section: Thermal Fluctuationsmentioning

confidence: 99%

Effects of Non-linear Electrodynamics on Thermodynamics of Charged Black Hole

Sharif,

Khan

2021

Preprint

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This paper investigates thermodynamics, quasi-normal modes, thermal fluctuations and phase transitions of Reissner-Nordström black hole with the effects of non-linear electrodynamics. We first compute the expressions for Hawking temperature, entropy and heat capacity of this black hole and then obtain a relation between Davies's point and quasi-normal modes with non-linear electrodynamics. We also observe the effects of logarithmic corrections on uncorrected thermodynamic quantities such as entropy, Hawking temperature, Helmholtz free energy, internal energy, Gibbs free energy, enthalpy and heat capacity. It is found that presence of non-linear electrodynamic parameter induces more instability in black holes of large radii. Finally, we analyze the phase transitions of Hawking temperature as well as heat capacity in terms of entropy for different values of charge (q), horizon radius (r + ) and coupling parameter (α). We obtain that Hawking temperature changes its phase from positive to negative for increasing values of q and r + while it shows opposite trend for higher values of α. The heat capacity changes its phase from negative to positive for large values of charge, horizon radius and coupling parameter.

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“…Hence, a detailed analysis of the Kiselev solution stability for different values of the metric parameters can be found in [24], superradiance and instabilities in the BH spacetime solutions are investigated with the dynamics of a probe scalar field in the BH spacetime. More general issue of Kiselev spacetime stability is also addressed in [25][26][27][28][29][30], with the analysis of the Quasi-Normal Modes (QNMs) spectrum (massless scalar perturbations, the late-time tails structure), and some thermodynamical aspects with superradiance and stability, the massive scalar superradiant scattering. Quasi-Periodic Oscillations (QPOs), QNMs and shadows of (Bardeen-)Kiselev BH are also explored in [31].…”

Section: Introductionmentioning

confidence: 99%

On dark energy effects on the accretion physics around a Kiselev spinning black hole

Pugliese,

Stuchlík

2024

Eur. Phys. J. C

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Kiselev metric in the static and rotating form is widely used to test different aspects of the dark energy (DE) effects. We consider a DE Kiselev spacetime, predicting the reduction to the Kerr black hole (BH) solution under suitable conditions on the DE parameters and in this frame we study the effects of the dark energy on BHs and disks accretion. Elaborating a close comparison with the limiting vacuum Kerr spacetime, we focus on thick accretion disks around the central BH in the Kiselev solution, both co-rotating and counter-rotating with respect the central BH. We examine different aspects of BH accretion energetics by focusing on quantities related to the accretion rates and cusp luminosity, when considered the DE presence, related to the pure Kerr central BH. Our findings show that in these conditions heavy divergences with respect to the vacuum case are expected for the DE metrics. A known effect of the Kiselev metric is to lead to a false estimation the BH spin, we confirm this characteristic from the fluids dynamics analysis. Remarkably our results show that DE is affecting differently the accretion physics, and particularly the accretion rate, according to the fluid rotation orientation with respect to the central spinning attractor, leading in some cases to an under-estimation of the BH spin mass ratio. These contrasting aspects emerging in dependence on the fluids rotational orientation can be a distinguishing general DE feature which could lead to a revised observational paradigm where DE existence is considered.

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Late-time tails, entropy aspects, and stability of black holes with anisotropic fluids

Cited by 12 publications

References 55 publications

Superradiance and instabilities in black holes surrounded by anisotropic fluids

Superradiance and instabilities in black holes surrounded by anisotropic fluids

Effects of Non-linear Electrodynamics on Thermodynamics of Charged Black Hole

On dark energy effects on the accretion physics around a Kiselev spinning black hole

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