2024 Black hole scalarization

Black hole scalarization

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August undefined, 2024

WebMar 30, 2024 · We show that in the mentioned class of ESTGB theories there exist new black-hole solutions that are formed by spontaneous scalarization of the Schwarzschild black holes in the extreme curvature regime. 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. …

Critical Phenomena in Dynamical Scalarization of Charged Black Holes.

WebJul 4, 2024 · We consider a class of scalar-Gauss-Bonnet gravity theories within which no tachyonic instability can occur. Although the Schwarzschild black holes are linearly stable against scalar perturbations, we show dynamically that for certain choices of the coupling function they are unstable against nonlinear scalar perturbations. 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. … black heath meadery richmond

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

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 … 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, … 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 … game xchange longview

Horizon curvature and spacetime structure influences on …

Black hole scalarization induced by the spin -- 2+1 time evolution

WebSep 4, 2024 · When both electric and magnetic charges are present, there exists an unstable region of parametric space for the dyonic RN black holes where the scalarization of black holes should occur. That is to say, mixing electric and magnetic charges can reduce the scalarization in this theory. Webthere is scalarization of both black holes and neutron stars has been receiving a lot of attention: scalar-Gauss-Bonnet theories (e.g. [11{13]). Scalarization of both black holes and neutron stars has been scrutinized in various works concerning many di er-ent modi cations (bare mass, self-interactions, di erent eld content, etc [14{19]). gamexchange lake charlesWebThe 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 scalarisation comes in two flavours, depending on the GB sign that triggers the phenomenon. Hereafter these two cases are termed GB± scalarisation. For vacuum … game x change logo

"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, … " - Black hole scalarization

Black hole scalarization

Black Hole Calculator - Fabio Pacucci (Harvard University …

WebJan 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... WebIn the simplest scalar-tensor theories, wherein the scalar field is non-minimally coupled to the Ricci scalar, spontaneous scalarization of electrovacuum black holes (BHs) does not occur. This ceases to be true in high…

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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 ...

WebDec 14, 2024 · We find a nonlinear mechanism for the black hole scalarization which is different from the spontaneous scalarization and report a new kind of dynamical critical phenomena in the bald/scalarized... 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.

WebJul 8, 2024 · In the simplest scalar-tensor theories, wherein the scalar field is non-minimally coupled to the Ricci scalar, spontaneous scalarization of electrovacuum black holes … 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 methods for solving the full, nonperturbative equations of motion.

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 …

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 … gamexchange nacogdoches game xchange jonesboro arWebMay 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 ... gamexchange marshall txWebAug 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. game xchange longview txWebWith 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, tachyonic instability of Kerr-Newman (KN) blac… game xchange mckinney txWebMay 18, 2024 · We study the dynamics of black holes in Einstein-scalar-Gauss-Bonnet theories that exhibit spontaneous black hole scalarization using recently introduced methods for solving the full, non-perturbative equations of motion. game x change little rock arWebApr 11, 2024 · PDF In this paper, we study the scalarization of the static and spherically symmetric dyonic Reissner–Nordstrom (RN) black holes in the... Find, read and cite all the research you need on ... game xchange mckinney