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In order to study the discrepancy between the supersymmetry bound and the extremality bound for rotating black holes, the effect of duality transformations on the class of stationary and axially symmetric string backgrounds, called the…

高能物理 - 理论 · 物理学 2007-05-23 E. Alvarez , P. Meessen , T. Ortin

We examine spherical gravitational collapse of a matter model with vanishing radial pressure and non-zero tangential pressure. It is seen analytically that the collapsing cloud either forms a black hole or disperses depending on values of…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Ashutosh Mahajan , Pankaj S. Joshi

We use the AdS/CFT correspondence to study the behavior of strongly-coupled quarks in a black hole background. The supergravity background consists of a six-dimensional Schwarzschild-black string AdS soliton, for which the bulk horizon…

高能物理 - 理论 · 物理学 2011-10-10 MD Razikul Islam , Justin F. Vazquez-Poritz

We obtain an exact rotating BTZ-like black hole solution by solving the corresponding gravitational field equations and the bumblebee motion equations in Einstein-bumblebee gravity theory. Result is presented for the purely radial Lorentz…

广义相对论与量子宇宙学 · 物理学 2023-07-10 Chikun Ding , Yu Shi , Jun Chen , Yuebing Zhou , Changqing Liu , Yuehua Xiao

Assessing the stability of higher-dimensional rotating black holes requires a study of linearized gravitational perturbations around such backgrounds. We study perturbations of Myers-Perry black holes with equal angular momenta in an odd…

高能物理 - 理论 · 物理学 2009-05-29 Hari K. Kunduri , James Lucietti , Harvey S. Reall

For dark matter to be detectable with gravitational waves from binary black holes, it must reach higher than average densities in their vicinity. In the case of light (wave-like) dark matter, the density of dark matter between the binary…

广义相对论与量子宇宙学 · 物理学 2024-05-29 Josu C. Aurrekoetxea , Katy Clough , Jamie Bamber , Pedro G. Ferreira

The interaction of binary black hole mergers with their environments can be studied using numerical relativity simulations. These start only a short finite time before merger, at which point appropriate initial conditions must be imposed. A…

广义相对论与量子宇宙学 · 物理学 2025-03-03 Jamie Bamber , Josu C. Aurrekoetxea , Katy Clough , Pedro G. Ferreira

We study the superradiant scattering of gravitational waves by a nearly extremal black hole (dimensionless spin $a=0.99$) by numerically solving the full Einstein field equations, thus including backreaction effects. This allows us to study…

广义相对论与量子宇宙学 · 物理学 2014-03-26 William E. East , Fethi M. Ramazanoğlu , Frans Pretorius

A supermassive black hole in the nucleus of an elliptical galaxy at the centre of a cool-core group or cluster of galaxies is immersed in hot gas. Bondi accretion should occur at a rate determined by the properties of the gas at the Bondi…

宇宙学与河外天体物理 · 物理学 2015-05-28 Ramesh Narayan , Andrew C. Fabian

Dark matter around black holes can induce drag forces through dynamical friction and accretion, potentially affecting the orbital evolution and gravitational wave emission of binary systems. While dynamical friction from scalar field dark…

广义相对论与量子宇宙学 · 物理学 2025-07-29 Shuo Xin , Elias R. Most

We investigate rotating Einstein-Maxwell-Dilaton (EMd) black holes in odd dimensions. Focusing on black holes with equal-magnitude angular momenta, we determine the domain of existence of these black holes. Non-extremal black holes reside…

广义相对论与量子宇宙学 · 物理学 2014-09-02 Jose Luis Blazquez-Salcedo , Jutta Kunz , Francisco Navarro-Lerida

Motivated by a geometric understanding of the angular velocity of a Kerr black hole in terms of a quasi-conformal map that describes a 2d Beltrami fluid flow, a new way to construct initial data sets for binary rotating black holes by…

广义相对论与量子宇宙学 · 物理学 2025-11-13 Shuanglin Huang , Xuefeng Feng , Yun-Kau Lau

This article deals with the study of some properties of the static and rotating black holes in Kalb-Ramond gravity in four dimensional spacetime. First, we discuss the action of the corresponding theory and the static black hole metric.…

广义相对论与量子宇宙学 · 物理学 2023-10-20 M. Zubair , Muhammad Ali Raza , Eiman Maqsood

The extensive catalog of waveforms, with details of binary black hole inspiral and merger, offer an opportunity to understand black hole interactions beyond the large separation regime. We envision a research program that focuses on the…

广义相对论与量子宇宙学 · 物理学 2024-05-07 Ritesh Bachhar , Richard Price , Gaurav Khanna

We consider the asymptotically flat double-Kerr solution for two equal mass black holes with either the same or opposite angular momentum and with a massless strut between them. For fixed angular momentum and mass, the angular velocity of…

广义相对论与量子宇宙学 · 物理学 2009-07-09 Miguel S. Costa , Carlos A. R. Herdeiro , Carmen Rebelo

Stellar evolution predicts the existence of a mass gap for black hole remnants produced by pair-instability supernova dynamics, whose lower and upper edges are very uncertain. We study the possibility of constraining the location of the…

高能天体物理现象 · 物理学 2024-01-25 Gabriele Franciolini , Konstantinos Kritos , Luca Reali , Floor Broekgaarden , Emanuele Berti

We construct a general class of non-extremal charged Kerr-de Sitter black holes in five dimensions, in which the two rotation parameters are set equal. There are three non-trivial parameters, namely the mass, charge and angular momentum.…

高能物理 - 理论 · 物理学 2009-09-17 M. Cvetic , H. Lu , C. N. Pope

Previously we showed that nearly extremal Ba\~{n}ados-Teitelboim-Zanelli (BTZ) black holes can be overspun by test bodies and fields, following the work of Rocha and Cardoso for the extremal case. The naked singularities in AdS space-times…

广义相对论与量子宇宙学 · 物理学 2024-07-09 Koray Düztaş

With the help of a generalized form of the metric ansatz found for the single-charge case in a previous work [S.Q. Wu, Phys. Rev. D 83, 121502(R) (2011)], I adopt a simple algorithm to construct the most general nonextremal rotating charged…

高能物理 - 理论 · 物理学 2012-01-04 Shuang-Qing Wu

We construct the gravitational dual, in the Unruh state, of the "jammed" phase of a CFT at strong coupling and infinite N on a fixed five-dimensional rotating Myers-Perry black hole with equal angular momenta. When the angular momenta are…

高能物理 - 理论 · 物理学 2013-08-01 Sebastian Fischetti , Jorge E. Santos