scholarly journals Electrostatics in the Surroundings of a Topologically Charged Black Hole in the Brane

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Alexis Larrañaga ◽  
Natalia Herrera ◽  
Sara Ramirez
Keyword(s):  
Black Hole ◽  
Electrostatic Potential ◽  
Point Charge ◽  
Charged Black Hole ◽  
Linear Perturbation ◽  
Black Hole Background ◽  
Black Hole Spacetime ◽  
Braneworld Model

We determine the expression for the electrostatic potential generated by a point charge held stationary in the topologically charged black hole spacetime arising from the Randall-Sundrum II braneworld model. We treat the static electric point charge as a linear perturbation on the black hole background and an expression for the electrostatic multipole solution is given: PACS: 04.70.-s, 04.50.Gh, 11.25.-w, 41.20.-q, 41.90.+e.

scholarly journals Particles and Scalar Waves in Noncommutative Charged Black Hole Spacetime

2015 ◽  
Vol 64 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Piyali Bhar ◽  
Farook Rahaman ◽  
Ritabrata Biswas ◽  
U.F. Mondal
Keyword(s):  
Black Hole ◽  
Charged Black Hole ◽  
Black Hole Spacetime ◽  
Scalar Waves

scholarly journals HAWKING RADIATION FROM KERR–NEWMAN BLACK HOLE AND TUNNELING MECHANISM

2010 ◽  
Vol 25 (21) ◽  
pp. 4123-4140 ◽  
Author(s):  
KOICHIRO UMETSU
Keyword(s):  
Black Hole ◽  
Dimensional Reduction ◽  
Hawking Radiation ◽  
Charged Black Hole ◽  
Spherically Symmetric ◽  
Two Dimensional ◽  
Tunneling Mechanism ◽  
Black Hole Background ◽  
Newman Black Hole ◽  
Spherically Symmetric Metric

We present the derivation of Hawking radiation by using the tunneling mechanism in a rotating and charged black hole background. We show that the four-dimensional Kerr–Newman metric, which has a spherically nonsymmetric geometry, becomes an effectively two-dimensional spherically symmetric metric by using the technique of the dimensional reduction near the horizon. We can thus readily apply the tunneling mechanism to the nonspherical Kerr and Kerr–Newman metric.

scholarly journals Quasi-normal modes of near-extremal black holes in generalized spherically symmetric spacetime and strong cosmic censorship conjecture

2020 ◽  
Vol 80 (10) ◽  
Author(s):  
Piyabut Burikham ◽  
Supakchai Ponglertsakul ◽  
Taum Wuthicharn
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Normal Modes ◽  
Cosmic Censorship ◽  
Analytic Formula ◽  
Spherically Symmetric ◽  
Black Hole Background ◽  
Strong Cosmic Censorship ◽  
Black Hole Spacetime ◽  
Symmetric Black Hole

AbstractA number of near-extremal conditions are utilized to simplify the equation of motion of the neutral scalar perturbations in generalized spherically symmetric black hole background into a differential equation with the Pöschl–Teller potential. An analytic formula for quasinormal frequencies is obtained. The analytic formula is then used to investigate strong cosmic censorship conjectures (SCC) of the generalized black hole spacetime for the smooth initial data. The Christodoulou version of the SCC is found to be violated for certain regions of the black hole parameter space including the black holes in general relativity while the $$C^{1}$$ C 1 version of the SCC is always valid.

scholarly journals Null geodesics and repulsive behavior of gravity in $(2+1)$D massive gravity

2019 ◽  
Vol 2019 (7) ◽  
Author(s):  
Keisuke Nakashi ◽  
Shinpei Kobayashi ◽  
Shu Ueda ◽  
Hiromi Saida
Keyword(s):  
Black Hole ◽  
Deflection Angle ◽  
Null Geodesic ◽  
Analytic Solutions ◽  
Massive Gravity ◽  
Geodesic Equation ◽  
Null Geodesics ◽  
Black Hole Background ◽  
Black Hole Spacetime ◽  
The Impact

Abstract We study the null geodesics in a static circularly symmetric (SCS) black hole spacetime, which is a solution in the $(2+1)$D massive gravity proposed by Bergshoeff, Hohm, and Townsend (BHT massive gravity). We obtain analytic solutions for the null geodesic equation in the SCS black hole background and find the explicit form of deflection angles. We see that, for various values of the impact parameter, the deflection angle can be positive, negative, or even zero in this black hole spacetime. The negative deflection angle indicates the repulsive behavior of the gravity that comes from the gravitational hair parameter that is the most characteristic quantity of the BHT massive gravity.

scholarly journals Quantum probe of time-like naked singularities for electrically and magnetically charged black holes in a model of nonlinear electrodynamics

2020 ◽  
Vol 35 (29) ◽  
pp. 2050242
Author(s):  
M. Mangut ◽  
O. Gurtug
Keyword(s):  
Black Hole ◽  
Quantum Mechanics ◽  
Time Evolution ◽  
Charged Black Hole ◽  
Nonlinear Electrodynamics ◽  
Naked Singularities ◽  
Black Hole Background ◽  
Quantum Wave ◽  
Electrically Charged ◽  
Specific Quantum

The time-like naked singularities of the electrically and magnetically charged black hole solutions obtained in a model of nonlinear electrodynamics proposed by Kruglov is investigated within the framework of quantum mechanics. In view of quantum mechanics, the spacetime is quantum regular provided that the time evolution of the test quantum wave packet uniquely propagates on an underlying background. Rigorous calculations have shown that when the singularity is probed with specific quantum wave/particle modes, the quantum wave operator turns out to be essentially self-adjoint. Thus, the time evolution of the quantum wave/particle is determined uniquely. In the case of electrically charged black hole background, the unique evolution is restricted to [Formula: see text]-wave only. For the two different magnetically charged black hole backgrounds, the time evolution is restricted to different modes for each case.

scholarly journals Detailed study of geodesics in the Kerr-Newman-(A)dS spacetime and the rotating charged black hole spacetime inf(R)gravity

2016 ◽  
Vol 94 (2) ◽  
Author(s):  
Saheb Soroushfar ◽  
Reza Saffari ◽  
Sobhan Kazempour ◽  
Saskia Grunau ◽  
Jutta Kunz
Keyword(s):  
Black Hole ◽  
Charged Black Hole ◽  
Black Hole Spacetime

scholarly journals Localization of Energy-Momentum for a Black Hole Spacetime Geometry with Constant Topological Euler Density

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Irina Radinschi ◽  
Theophanes Grammenos ◽  
Farook Rahaman ◽  
Andromahi Spanou ◽  
Marius Mihai Cazacu ◽  
...  
Keyword(s):  
Black Hole ◽  
Cosmological Constant ◽  
Momentum Distribution ◽  
Black Hole Solution ◽  
Charged Black Hole ◽  
Nonlinear Electrodynamics ◽  
Radial Coordinate ◽  
Spherically Symmetric ◽  
Spacetime Geometry ◽  
Black Hole Spacetime

The evaluation of the energy-momentum distribution for a new four-dimensional, spherically symmetric, static and charged black hole spacetime geometry with constant nonzero topological Euler density is performed by using the energy-momentum complexes of Einstein and Møller. This black hole solution was recently developed in the context of the coupled Einstein–nonlinear electrodynamics of the Born-Infeld type. The energy is found to depend on the mass M and the charge q of the black hole, the cosmological constant Λ, and the radial coordinate r, while in both prescriptions all the momenta vanish. Some limiting and particular cases are analyzed and discussed, illustrating the rather extraordinary character of the spacetime geometry considered.

scholarly journals Regular charged black hole construction in dimensions

2012 ◽  
Vol 376 (8-9) ◽  
pp. 893-898 ◽  
Author(s):  
S. Habib Mazharimousavi ◽  
M. Halilsoy ◽  
T. Tahamtan
Keyword(s):  
Black Hole ◽  
Charged Black Hole
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