Geodesic motion around hairy black holes

Ramos, A.; Arias, C.; Avalos, R.; Contreras, Ernesto

doi:10.1016/j.aop.2021.168557

Cited by 20 publications

(17 citation statements)

References 103 publications

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“…As can be seen, in both cases the NEC violation along the radial direction at the wormhole throat, is less in magnitude than in the pure GR case (see (74)). So, it can be argued that MGD helps to reduce the NEC violation, such that the wormhole is supported by a smaller amount of exotic matter than in the pure GR case.…”

Section: Matter Distribution Analysismentioning

confidence: 77%

“…For example, in considering spherically symmetric perfect fluid matter distributions representing neutron stars, this methodology has been employed to translate these solutions to an anisotropic domains. [48,[55][56][57][58][59][60][61][62][63][64][65][66][67][68][69] Also, this approach has been used to obtain new black hole solutions (hairy and non-hairy) [70][71][72][73] and, the properties of some of these solutions have been analyzed in [74]. Beyond the mentioned scenarios, this scheme was spread out into the context of 2+1 [75][76][77] and higher dimensions, [78,79] cosmology, [80] black hole thermodynamics, [81] black strings, [82] holography, [83,84] axially symmetric geometries, [85] modified gravity theories [86][87][88] and the so-called inverse problem 1 .…”

Section: Introductionmentioning

confidence: 99%

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Minimally Deformed Wormholes Inspired by Noncommutative Geometry

Tello‐Ortiz

Mishra

Alvarez

et al. 2022

Fortschritte der Physik

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In this article, new wormhole solutions in the framework of General Relativity are presented. Taking advantage of gravitational decoupling by means of minimal geometric deformation approach and, the so–called noncommutative geometry Gaussian and Lorentzian density profiles, the seminal Morris–Thorne space–time is minimally deformed providing new asymptotically wormhole solutions. Constraining the signature of some parameters, the dimensionless constant α is bounded using the flare–out and energy conditions. In both cases, this results in an energy–momentum tensor that violates energy conditions, thus the space–time is threading by an exotic matter distribution. However, it is possible to obtain a positive defined density at the wormhole throat and its neighborhood. To further support the study a thoroughly graphical analysis has been performed.

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Section: Matter Distribution Analysismentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Minimally Deformed Wormholes Inspired by Noncommutative Geometry

Tello‐Ortiz

Mishra

Alvarez

et al. 2022

Fortschritte der Physik

View full text Add to dashboard Cite

show abstract

“…This solution satisfies the DEC. Before concluding this section, a couple of comments are in order. First, it is worth mentioning that in [75] the geodesic analysis of the set of metric describing models 1-4 has been performed. In such a work, the authors not only studied the basic stuff related to the motion of massive and massless particles around the hairy black hole but they explored their potential as a mimickers of rotating black holes based on available data.…”

Section: Modelmentioning

confidence: 99%

“…with f the lapse function under consideration. The radius of the photon sphere of the metrics under consideration was obtained numerically and are shown in figure 7 of [75] for {α, 0 } ∈ (0, 3). Using this data in (11), we obtain R s as function of the primary hairs as is shown in Fig.…”

Section: Modelmentioning

confidence: 99%

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Quasi normal modes of hairy black holes at higher-order WKB approach

Avalos

Contreras

2023

Eur. Phys. J. C

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In this work, we implement the 13th order semi-analytical WKB method to explore the stability of hairy black holes obtained in the framework of Gravitational Decoupling. In particular, we perform a detailed analysis of the frequencies of the quasi-normal modes as a function of the primary hair of the solutions with the aim to bound their values. We explore a broad interval in a step of 0.1 of the hair parameters. We find that except for some cases where the method is expected to have poor accuracy, all the solutions seem to be stable and the role played by the primary hair is twofold: to modulate the damping factor of the perturbation and to decrease the frequency of its oscillation.

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A Static and Spherically Symmetric Hairy Black Hole in the Framework of the Gravitational Decoupling

Avalos

Bargueño

Contreras

2023

Fortschritte der Physik

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In this work we construct a static and spherically symmetric black hole geometry supported by a family of generic mono-parametric sources thorough the Gravitational Decoupling. The parameter characterizing the matter sector can be interpreted as hair which cannot be associated to any global charge. Although the solution is constructed by demanding the weak energy condition, we find that the resulting matter sector satisfies all the energy conditions at and outside the horizon. We study the effect of the hair on the periastron advance and the gravitational lensing of the black hole. We estimate the best WKB order to compute the quasinormal frequencies for scalar, vector and tensor perturbation fields.

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Geodesic motion around hairy black holes

Cited by 20 publications

References 103 publications

Minimally Deformed Wormholes Inspired by Noncommutative Geometry

Minimally Deformed Wormholes Inspired by Noncommutative Geometry

Quasi normal modes of hairy black holes at higher-order WKB approach

A Static and Spherically Symmetric Hairy Black Hole in the Framework of the Gravitational Decoupling

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