Uniqueness of Kerr–Newman–de Sitter Black Holes with Small Angular Momenta

Recently, it was shown that the conserved charges of asymptotically anti-de Sitter spacetimes can be written in an explicitly gauge-invariant way in terms of the linearized Riemann tensor and the Killing vectors. Here, we employ this construction to compute the mass and angular momenta of the [Formula: see text]-dimensional Kerr-AdS black holes, which is one of the most remarkable Einstein metrics generalizing the four-dimensional rotating black hole.

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Scattering on Quasi-Spherical Black-Holes: Features and Beyond

Physics ◽

10.3390/physics3010004 ◽

2021 ◽

Vol 3 (1) ◽

pp. 17-41

Author(s):

Adam M. Arslanaliev ◽

Alexei J. Nurmagambetov

Keyword(s):

Black Holes ◽

Gravitational Waves ◽

Cross Sections ◽

Theoretical Models ◽

Strong Impact ◽

De Sitter ◽

Deformation Degree ◽

Angular Momenta ◽

Recent Developments ◽

Grey Body

Recent developments in the gravitational waves interferometry require more pertinent theoretical models of gravitational waves generation and propagation. Untouched possible mechanisms of spin-2 spacetime perturbations production, we will consider their subsequent scattering on other black holes (BHs). Specifically, we consider a generalization of the Regge-Wheeler-Zerilli equations for the case of distorted BHs (BHs surrounded with matter) in Minkowski and Anti-de Sitter spacetimes, the metric potential of which obeys the Liouville equation. We establish significant differences in scattering characteristics of waves of different spins and angular momenta, including the gravitational waves, caused by losing the spherical symmetry of their propagation background. In particular, we demonstrate the strong impact of the background geometry deformation on the grey-body factors, hence on the absorption cross-sections of scattering waves, and explore the issue of stability of the background geometry upon changing the deformation degree parameters.

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Massive Dirac quasinormal modes in Schwarzschild–de Sitter black holes: Anomalous decay rate and fine structure

Physical Review D ◽

10.1103/physrevd.103.064006 ◽

2021 ◽

Vol 103 (6) ◽

Author(s):

Almendra Aragón ◽

Ramón Bécar ◽

P. A. González ◽

Yerko Vásquez

Keyword(s):

Black Holes ◽

Fine Structure ◽

Decay Rate ◽

Quasinormal Modes ◽

De Sitter

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Bifurcation of the Maxwell quasinormal spectrum on asymptotically anti–de Sitter black holes

Physical Review D ◽

10.1103/physrevd.103.064079 ◽

2021 ◽

Vol 103 (6) ◽

Author(s):

Mengjie Wang ◽

Zhou Chen ◽

Xin Tong ◽

Qiyuan Pan ◽

Jiliang Jing

Keyword(s):

Black Holes ◽

De Sitter

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Driven black holes: from Kolmogorov scaling to turbulent wakes

Journal of High Energy Physics ◽

10.1007/jhep07(2021)063 ◽

2021 ◽

Vol 2021 (7) ◽

Author(s):

Tomas Andrade ◽

Christiana Pantelidou ◽

Julian Sonner ◽

Benjamin Withers

Keyword(s):

Nonlinear Dynamics ◽

Black Holes ◽

General Relativity ◽

Black Hole ◽

Strong Field ◽

De Sitter ◽

Event Horizons ◽

Binary Mergers ◽

Tidal Deformations ◽

Proof Of Principle

Abstract General relativity governs the nonlinear dynamics of spacetime, including black holes and their event horizons. We demonstrate that forced black hole horizons exhibit statistically steady turbulent spacetime dynamics consistent with Kolmogorov’s theory of 1941. As a proof of principle we focus on black holes in asymptotically anti-de Sitter spacetimes in a large number of dimensions, where greater analytic control is gained. We focus on cases where the effective horizon dynamics is restricted to 2+1 dimensions. We also demonstrate that tidal deformations of the horizon induce turbulent dynamics. When set in motion relative to the horizon a deformation develops a turbulent spacetime wake, indicating that turbulent spacetime dynamics may play a role in binary mergers and other strong-field phenomena.

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Weak gravity bounds in asymptotic string compactifications

Journal of High Energy Physics ◽

10.1007/jhep06(2021)162 ◽

2021 ◽

Vol 2021 (6) ◽

Author(s):

Brice Bastian ◽

Thomas W. Grimm ◽

Damian van de Heisteeg

Keyword(s):

Black Holes ◽

Moduli Space ◽

Mass Formula ◽

Complex Structure ◽

Mass Ratio ◽

De Sitter ◽

String Compactifications ◽

Type Iib String Theory ◽

Bps States ◽

Weak Gravity

Abstract We study the charge-to-mass ratios of BPS states in four-dimensional $$ \mathcal{N} $$ N = 2 supergravities arising from Calabi-Yau threefold compactifications of Type IIB string theory. We present a formula for the asymptotic charge-to-mass ratio valid for all limits in complex structure moduli space. This is achieved by using the sl(2)-structure that emerges in any such limit as described by asymptotic Hodge theory. The asymptotic charge-to-mass formula applies for sl(2)-elementary states that couple to the graviphoton asymptotically. Using this formula, we determine the radii of the ellipsoid that forms the extremality region of electric BPS black holes, which provides us with a general asymptotic bound on the charge-to-mass ratio for these theories. Finally, we comment on how these bounds for the Weak Gravity Conjecture relate to their counterparts in the asymptotic de Sitter Conjecture and Swampland Distance Conjecture.

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Uptunneling to de Sitter

Journal of High Energy Physics ◽

10.1007/jhep09(2020)070 ◽

2020 ◽

Vol 2020 (9) ◽

Author(s):

Mehrdad Mirbabayi

Keyword(s):

Black Holes ◽

Black Hole ◽

False Vacuum ◽

De Sitter ◽

Dimensional Theory ◽

Hole Geometry ◽

Horizon Geometry ◽

Two Sides ◽

Extremal Black Holes

Abstract We propose a Euclidean preparation of an asymptotically AdS2 spacetime that contains an inflating dS2 bubble. The setup can be embedded in a four dimensional theory with a Minkowski vacuum and a false vacuum. AdS2 approximates the near horizon geometry of a two-sided near-extremal Reissner-Nordström black hole, and the two sides can connect to the same Minkowski asymptotics to form a topologically nontrivial worm- hole geometry. Likewise, in the false vacuum the near-horizon geometry of near-extremal black holes is approximately dS2 times 2-sphere. We interpret the Euclidean solution as describing the decay of an excitation inside the wormhole to a false vacuum bubble. The result is an inflating region inside a non-traversable asymptotically Minkowski wormhole.

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Hamiltonian charges in the asymptotically de Sitter spacetimes

Journal of High Energy Physics ◽

10.1007/jhep05(2021)063 ◽

2021 ◽

Vol 2021 (5) ◽

Author(s):

Maciej Kolanowski ◽

Jerzy Lewandowski

Keyword(s):

Phase Space ◽

Initial Data ◽

Exact Solutions ◽

Gravitational Waves ◽

Physical Meaning ◽

De Sitter ◽

Killing Vectors ◽

Asymptotically Flat ◽

Angular Momenta ◽

The One

Abstract We generalize a notion of ‘conserved’ charges given by Wald and Zoupas to the asymptotically de Sitter spacetimes. Surprisingly, our construction is less ambiguous than the one encountered in the asymptotically flat context. An expansion around exact solutions possessing Killing vectors provides their physical meaning. In particular, we discuss a question of how to define energy and angular momenta of gravitational waves propagating on Kottler and Carter backgrounds. We show that obtained expressions have a correct limit as Λ → 0. We also comment on the relation between this approach and the one based on the canonical phase space of initial data at ℐ+.

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