Hairy black holes in the XX-th and XXI-st centuries

Volkov, Mikhail S.

doi:10.1142/9789813226609_0184

Cited by 37 publications

(46 citation statements)

References 86 publications

(126 reference statements)

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“…Consequently, only restricted families of many modified theories of gravity turned out to be explicitly compatible with these constraints [21]. Regarding the theoretical analysis, the so-called "no-hair" theorems [22,23] provide another kind of argument to appraise the relevance of a given modified theory. Such theorems state the equivalence between a modified theory and GR relative to black hole solutions.…”

Section: Arxiv:191008451v1 [Gr-qc] 18 Oct 2019mentioning

confidence: 99%

Hairy rotating black holes in cubic Galileon theory

Aelst¹,

Gourgoulhon²,

Grandclément³

et al. 2020

Class. Quantum Grav.

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Numerical solutions for asymptotically flat rotating black holes in the cubic Galileon theory are presented. These black holes are endowed with a nontrivial scalar field and exhibit a non-Schwarzschild behaviour: faster than 1/r convergence to Minkowski spacetime at spatial infinity and hence vanishing of the Komar mass. The metrics are compared with the Kerr metric for various couplings and angular velocities. Their physical properties are extracted and show significant deviations from the Kerr case.

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Section: Arxiv:191008451v1 [Gr-qc] 18 Oct 2019mentioning

confidence: 99%

Hairy rotating black holes in cubic Galileon theory

Aelst¹,

Gourgoulhon²,

Grandclément³

et al. 2020

Class. Quantum Grav.

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“…7 On the level of low-energy effective theory this coupling is fully legitimate because it respects all the symmetries.…”

Section: Aharonov-bohm Skyrmion Black Hole Hairmentioning

confidence: 99%

“…[3,4,5,6,7] for some reviews). In that context one of the most interesting results, in our opinion, has been the discovery of dynamically-stable 1 and asymptotically-flat classical black hole solutions of the Einstein-Skyrme equations with geometries which are not of Kerr-Newman form [8].…”

Section: Introductionmentioning

confidence: 99%

Aspects of Skyrmion Black Hole Hair

Gußmann¹

2017

Proceedings of Corfu Summer Institute 2016 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2016)

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In this short article, prepared for the proceedings of the Corfu Meeting 2016, I review three aspects of skyrmion/baryon black hole hair which have been investigated recently [1,2] and which I presented in my talk in Corfu. First, I will argue that one can detect the classical skyrmion/baryon hair which, as it is well-known [8], a small enough black hole can carry in classical scattering experiments of waves. Second, I will show that, under certain assumptions which I will point out, a black hole can not only carry the known classical skyrmion/baryon hair but also a quantum skyrmion/baryon hair which can be detected in Aharonov-Bohm type experiments in which a probe string encloses the black hole. In contrast to the known classical skyrmion/baryon hair, the Aharonov-Bohm type quantum skyrmion/baryon hair can be carried by black holes of arbitrary size. Third, I will argue that from the point of view of a low-energy observer who can measure the Aharonov-Bohm type skyrmion/baryon hair of a black hole, black holes respect Skyrme topological charge/baryon number.

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“…In this paper instead we will follow a different route. We will assume that the UV cutoff of the dark energy EFT, and 3 Note that the frequencies of the LIGO measurement of GW170817 are close to Λ 3 , so additional assumptions about the UV physics are implicitly made when using this measurement to constrain such 'cosmological' operators suppressed by Λ 3 [19]. 4 The exact definition of the operators is given below in Eq.…”

Section: Introduction and Setupmentioning

confidence: 99%

Black hole ringdown as a probe for dark energy

2020

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Under the assumption that a dynamical scalar field is responsible for the current acceleration of the Universe, we explore the possibility of probing its physics in black hole merger processes with gravitational wave interferometers. Remaining agnostic about the microscopic physics, we use an effective field theory approach to describe the scalar dynamics. We investigate the case in which some of the higher derivative operators, that are highly suppressed on cosmological scales, instead become important on typical distances for black holes. If a coupling to the Gauss-Bonnet operator is one of them, a non-trivial background profile for the scalar field can be sourced in the surrounding of the black hole, resulting in a potentially large amount of 'hair'. In turn, this can induce sizeable modifications to the spacetime geometry or a mixing between the scalar and the gravitational perturbations. Both effects will ultimately translate into a modification of the quasi-normal mode spectrum in a way that is also sensitive to other operators besides the one sourcing the scalar background. The presence of deviations from the predictions of general relativity in the observed spectrum can therefore serve as a window onto dark energy physics.

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Hairy black holes in the XX-th and XXI-st centuries

Cited by 37 publications

References 86 publications

Hairy rotating black holes in cubic Galileon theory

Hairy rotating black holes in cubic Galileon theory

Aspects of Skyrmion Black Hole Hair

Black hole ringdown as a probe for dark energy

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