Black hole scalarization

Author: mqta

August undefined, 2024

WebNov 3, 2024 · Scalarization is a mechanism that endows strongly self-gravitating bodies, such as neutron stars and black holes, with a scalar field configuration. It resembles a phase transition in that the scalar configuration only appears when a certain quantity that characterizes the compact object, e.g., its compactness or spin, is beyond a threshold. … WebFeb 3, 2024 · The simplest way to answer this question would be to compare the spectra of stellar-mass and supermassive black holes before and after a state transition, to see if the spectra evolve in the same way. …

Charged Gauss-Bonnet black holes with curvature induced scalarization …

WebApr 10, 2024 · Download Citation Temperatures of AdS$_2$ black holes and holography revisited In a dilaton gravity model, we revisit the calculation of the temperature of an evaporating black hole that is ... stargrout sikaceram epoxica blanca

[2105.04479] Black hole scalarization with Gauss-Bonnet …

WebMar 16, 2024 · Even though black hole scalarization has been extensively studied recently, little has been done in the direction of understanding the dynamics of this process, especially in the rapidly rotating regime. In the present paper, we focus exactly on this problem by considering the nonlinear dynamics of the scalar field while neglecting the … WebNov 28, 2024 · The black hole scalarization in a special Einstein-scalar–Gauss–Bonnet (EsGB) gravity has been widely investigated in recent years. Especially, the spontaneous scalarization of scalar-free ... WebSep 3, 2024 · We study the dynamics of black holes in scalar Einstein–Gauss-Bonnet theories that exhibit spontaneous black hole scalarization using recently introduced … star group home norwalk ct

Extreme black holes have hair that can be combed - Phys.org

Phys. Rev. D 104, 044002 (2024) - Black hole scalarization with Gauss ...

WebThe Bondi radius ( Bondi, 1952) is the radius of the sphere of gravitational influence of the black hole. A test mass inside this sphere feels the gravitational presence of the black hole. As it is derived from setting the … WebFeb 15, 2024 · Spontaneous scalarization of charged black holes at the approach to extremality Yves Brihaye (Universite de Mons, Belgium), Betti Hartmann (IFSC/USP, Brazil) We study static, spherically symmetric and electrically charged black hole solutions in a quadratic Einstein-scalar-Gauss-Bonnet gravity model. star groups in the skyWebJan 26, 2024 · In fact, black holes can be fully characterized by only three physical quantities: their mass, spin and charge. Since they have no additional "hairy" attributes to distinguish them, black... peterborough trim repairs peterborough

"WebJun 4, 2024 · We study scalar fields in a black hole background and show that, when the scalar is suitably coupled to curvature, rapid rotation can induce a tachyonic instability. This instability, which is the hallmark of spontaneous scalarization in the linearized regime, is expected to be quenched by nonlinearities and endow the black hole with scalar hair. " - Black hole scalarization

Black hole scalarization

The shape of scalar Gauss-Bonnet gravity SpringerLink

WebWith certain non-minimal coupling between a massless scalar field and the Gauss-Bonnet curvature invariant in the extended scalar-tensor-Gauss-Bonnet (ESTGB) field theory, … WebMay 16, 2024 · Spontaneous scalarization is a famous notion of beyond GR theory. Black hole scalarization is one of the key concepts of holographic superconductors theory due to the spontaneous U(1) symmetry ...

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WebJan 7, 2024 · Focusing, for illustrative purposes, on a class of theories that do exhibit this instability, we show that stationary, rotating black hole solutions do indeed have scalar hair once the spin-induced instability threshold is exceeded, while black holes that lie below the threshold are described by the Kerr solution. WebAug 2, 2024 · Abstract Spontaneous scalarization is a gravitational phenomenon in which deviations from general relativity arise once a certain threshold in curvature is exceeded, while being entirely absent below that threshold. For black holes, scalarization is known to be triggered by a coupling between a scalar and the Gauss-Bonnet invariant.

WebSep 22, 2024 · Black hole spontaneous scalarization has been attracting more and more attention as it circumvents the well-known no-hair theorems. In this work, we study the … WebAug 17, 2024 · In Gauss-Bonnet gravity the source of the scalar field can be the curvature of the space-time. It was recently shown that for a particular type of coupling function between the scalar field and the Gauss-Bonnet invariant, …

WebDec 15, 2024 · The mass gained by the black hole is the initial mass of the other object minus the mass that was converted into energy. The new mass of the black hole, … WebMay 10, 2024 · For black holes, scalarization is known to be triggered by a coupling between a scalar and the Gauss-Bonnet invariant. A coupling with the Ricci scalar, …

WebA black hole is a region of spacetime where gravity is so strong that nothing, including light or other electromagnetic waves, has enough energy to escape its event horizon. [2] The …

WebDec 22, 2024 · Black hole spontaneous scalarization has been attracting more and more attention as it circumvents the well-known no-hair theorems. In this work, we study the … peterborough turboWebApr 11, 2024 · In this paper, we study the scalarization of the static and spherically symmetric dyonic Reissner–Nordstrom (RN) black holes in the Einstein–Maxwell-scalar theory where the scalar field is coupled to an electromagnetic Chern–Simons term. stargroup sturnoWebDec 29, 2024 · In the present paper we study the onset of the spin-induced scalarization of a Kerr black hole in scalar-Gauss–Bonnet gravity with a massive scalar field. Our approach is based on a (2+1) time evolution of the relevant linearized scalar … star groups astronomyWebApr 22, 2024 · Abstract We report a new black hole (BH) scalarization mechanism and disclose novel dynamical critical phenomena in the process of the nonlinear accretion of … peterborough truck show 2023WebThe Black Hole Calculator computes quantities about black holes in two systems of units. Add the inputs and press Calculate. The outputs in the Standard Mode and the Advanced Mode are: Standard Mode: Category, … star growth chartWebMar 11, 2024 · We study the consistency of Scalar Gauss-Bonnet Gravity, a generalization of General Relativity where black holes can develop non-trivial hair by the action of a coupling F (Φ) \mathcal {G} between a function of a scalar field and the Gauss-Bonnet invariant of the space-time. peterborough tsb branchWebThe general relativity vacuum black holes (BHs) can be scalarised in models where a scalar field non-minimally couples to the Gauss-Bonnet (GB) invariant. Such GB … star growth