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Hairy black holes by gravitational decoupling
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Hairy black holes by gravitational decoupling
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Black holes with hair represented by generic fields surrounding the central source of the vacuum Schwarzschild metric are examined under the minimal set of requirements consisting of i) the existence of a well defined event horizon and ii) the strong or dominant energy condition for the hair outside the horizon. We develop our analysis by means of the gravitational decoupling approach. We find that trivial deformations of the seed Schwarzschild vacuum preserve the energy conditions and provide a new mechanism to evade the no-hair theorem based on a primary hair associated with the charge generating these transformations. Under the above conditions i) and ii), this charge consistently increases the entropy from the minimum value given by the Schwarzschild geometry. As a direct application, we find a non-trivial extension of the Reissner-Nordstrom black hole showing a surprisingly simple horizon. Finally, the non-linear electrodynamics generating this new solution is fully specified.
Forward citations
Cited by 12 Pith papers
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Spin-Hair Induced Chaos of Spinning Test Particles in Rotating Hairy Black Holes
Spinning test particles around rotating hairy black holes show finite-time instability in localized regions of the (spin, hair-parameter) plane that reorganize the strong-field phase space compared to Kerr.
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Analytical solution of traversable wormholes in the presence of positive cosmological constant
An analytical traversable wormhole solution with positive cosmological constant is obtained via gravitational decoupling on the Ellis-Bronnikov metric, featuring a cosmological throat, verified flare-out conditions, n...
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Coherent quantum hairy black holes from gravitational decoupling: regularity, geodesics, and scalar ringdown
Gaussian-smearing the gravitational-decoupling hairy black hole produces a regular core and modified photon rings, lensing, and a claimed but absent ringdown spectrum.
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Regular black holes with Minkowskian cores: causal structure and observational degeneracy
Regular black holes with Minkowskian cores constructed by gravitational decoupling produce shadows and accretion-disk images nearly indistinguishable from Kerr/Schwarzschild despite radically different interiors.
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Regular hairy black holes by gravitational decoupling: Bardeen and Minkowski-core seeds
Two families of regular hairy black holes are generated from Bardeen and Minkowski-core seeds using gravitational decoupling with an exponential profile, yielding de Sitter or flat cores, critical horizon parameters, ...
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Echoes of a hairy black hole from gravitational decoupling
Axial perturbations around a hairy black hole from gravitational decoupling produce echo-like gravitational-wave signals that arise dynamically from a double-peak trapping cavity in the effective potential.
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Echoes of a hairy black hole from gravitational decoupling
Axial perturbations of a gravitationally decoupled hairy black hole develop a double-peak potential that dynamically generates echo-like late-time waveforms in a suitable (α, β) region.
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Regular black holes with Minkowskian cores: causal structure and observational degeneracy
A new family of regular black holes with Minkowskian cores is built via gravitational decoupling; their shadows and thin-disk images are nearly indistinguishable from Schwarzschild/Kerr, though the weak-energy-conditi...
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Light Deflection due to Spinoptic Effects in Parametrized and Spherically Symmetric Hairy Black Holes
Spinoptics calculations show parameter-dependent out-of-plane deflection angles for light in RZ and hairy black hole spacetimes, with assessment of mimicry between the models.
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Regular hairy black holes by gravitational decoupling: Bardeen and Minkowski-core seeds
Two families of regular hairy black holes are built from Bardeen and hollow seeds by gravitational decoupling with exponential deformation, including critical deformation strengths and Kerr-like rotating extensions.
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Reissner Nordstrom black holes with integrable singularity interiors supported by string distributions
A fluid-of-strings cloud is proposed as an integrable-singularity interior for the Reissner–Nordström exterior, but the field equations for the new model do not close.
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Gravitational decoupling and regular hairy black holes: Geodesic stability, quasinormal modes, and thermodynamic properties
For the regular hairy black hole metric (29), larger β shrinks the ISCO and photon sphere, reduces QNM damping, and adds a canonical-ensemble stable phase.
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