Gravitational decoupling, hairy black holes and conformal anomalies

Meert, P.; Rocha, Roldão da

doi:10.1140/epjc/s10052-022-10121-6

Cited by 27 publications

(11 citation statements)

References 76 publications

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“…Since Ref. [66] showed that GD hairy black holes can be accurately emulated in the membrane paradigm of AdS/CFT, one can still interpret the results here obtained in the light of Ref. [103].…”

Section: Conclusion and Perspectivesupporting

confidence: 51%

“…When starting by a perfect fluid, one can couple it to more elaborated types of stress-energymomentum tensors, that underlie realistic compact configurations . Particularly the case of GD involving hairy solutions has been explored, with astonishing and relevant physical ramifications [63][64][65][66]. Hairy black holes present additional degrees of freedom of macroscopic nature, which are not associated with a Gauss flux theorem for gravity.…”

Section: Introductionmentioning

confidence: 99%

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Echoes of the gravitational decoupling: scalar perturbations and quasinormal modes of hairy black holes

Cavalcanti¹,

Paiva²,

Rocha³

2022

Preprint

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The behavior of hairy black hole solutions, obtained by the gravitational decoupling (GD) method, is investigated under scalar perturbations. The quasinormal mode frequencies of such solutions are regulated by GD hair. The numerically generated wave solutions are derived for a range of values for the GD hairy black hole parameters, with higher-frequency modes very sensitive to them. The results are confronted with the corresponding ones for the Schwarzschild solution, whose deviations from it demonstrate a unique physical identification of GD hairy black holes. The method here presented comprises the first steps towards the obtainment of the observable signature of GD hairy black holes at ground-based detectors, emitted from coalescing binary systems of GD hairy black hole mergers in the ringdown phase.

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Section: Conclusion and Perspectivesupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Echoes of the gravitational decoupling: scalar perturbations and quasinormal modes of hairy black holes

Cavalcanti¹,

Paiva²,

Rocha³

2022

Preprint

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show abstract

“…[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]). Even this framework has been used widely in several scenarios such as 2 + 1 space-times [50][51][52][53][54][55], higher dimensions [56,57], asymptotically (A-)dS space-times [58], for axially symmetric systems and rotating black holes [59], hairy black holes [60][61][62], Cosmology [63,64], solutions in the background of Reissner-Nordström space-time [65][66][67], modified gravity theories [68][69][70][71][72][73][74][75][76][77][78], as well in braneworld gravity [79][80]…”

Section: Introductionmentioning

confidence: 99%

An anisotropic extension of Heintzmann IIa solution with vanishing complexity factor

Andrade

2022

Eur. Phys. J. C

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This work is devoted to the construction of a new static and spherical solution for an anisotropic fluid distribution. The construction is based in the framework of gravitational decoupling through a particular case of the extended minimal geometric deformation called 2-steps GD. In this sense, the differential equations arising from gravitational decoupling are closed using the vanishing complexity factor. The Heintzmann IIa solution is used as seed solution. The solution fulfills the fundamental physical acceptability conditions for a restricted set of compactness parameters.

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“…These solutions describe a black hole with hair represented by generic fields surrounding the central source of the vacuum Schwarzschild metric, requiring the existence of a well-defined event horizon and hair that obeys the strong energy conditions outside the horizon [18]. Some interesting consequences of these hairy black holes have been investigated [25][26][27], and there is much to be done in the future.…”

Section: Introductionmentioning

confidence: 99%

Near-Horizon Thermodynamics of Hairy Black Holes from Gravitational Decoupling

2022

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The horizon structure and thermodynamics of hairy spherically symmetric black holes generated by the gravitational decoupling method are carefully investigated. The temperature and heat capacity of the black hole is determined, as well as how the hairy parameters affect the thermodynamics. This allows for an analysis of thermal stability and the possible existence of a remanent black hole. We also calculate the Hawking radiation corrected by the generalized uncertainty principle. We consider the emission of fermions and apply the tunneling method to the generalized Dirac equation. This shows that, despite the horizon location being the same as the Schwarzschild one for a suitable choice of parameters, the physical phenomena that occur near the horizon of both black holes are qualitatively different.

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Gravitational decoupling, hairy black holes and conformal anomalies

Cited by 27 publications

References 76 publications

Echoes of the gravitational decoupling: scalar perturbations and quasinormal modes of hairy black holes

Echoes of the gravitational decoupling: scalar perturbations and quasinormal modes of hairy black holes

An anisotropic extension of Heintzmann IIa solution with vanishing complexity factor

Near-Horizon Thermodynamics of Hairy Black Holes from Gravitational Decoupling

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