Separability of massive field equations for spin-0 and spin-1/2charged particles in the general nonextremal rotating charged black hole spacetimes in minimal five-dimensional gauged supergravity

In this study, we derive, in the framework of mimetic theory, charged and non-charged black hole solutions for spherically symmetric as well as flat horizon spacetimes. The asymptotic behavior of those black holes behave as flat or (A)dS spacetimes and coincide with the solutions derived before in general relativity theory. Using the field equations of non-linear electrodynamics mimetic theory we derive new black hole solutions with monopole and quadrupole terms. The quadruple term of those black holes is related by a constant so that its vanishing makes the solutions coincide with the linear Maxwell black holes. We study the singularities of those solutions and show that they possess stronger singularity than the ones known in general relativity. Among many things, we study the horizons as well as the heat capacity to see if the black holes derived in this study have thermodynamical stability or not.

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Charged black hole and radiating solutions in entangled relativity

The European Physical Journal C ◽

10.1140/epjc/s10052-021-09441-w ◽

2021 ◽

Vol 81 (7) ◽

Author(s):

Olivier Minazzoli ◽

Edison Santos

Keyword(s):

Black Hole ◽

Matter Field ◽

Charged Black Hole ◽

Field Equations ◽

Pure Radiation ◽

Schwarzschild Metric ◽

Definition Of ◽

Matter Fields ◽

Infinite Range ◽

Black Hole Solutions

AbstractIn this manuscript, we show that the external Schwarzschild metric can be a good approximation of exact black hole solutions of entangled relativity. Since entangled relativity cannot be defined from vacuum, the demonstrations need to rely on the definition of matter fields. The electromagnetic field being the easiest (and perhaps the only) existing matter field with infinite range to consider, we study the case of a charged black hole – for which the solution of entangled relativity and a dilaton theory agree – as well as the case of a pure radiation – for which the solution of entangled relativity and general relativity seem to agree, despite an apparent ambiguity in the field equations. Based on these results, we argue that the external Schwarzschild metric is an appropriate mathematical idealization of a spherical black hole in entangled relativity. The extension to rotating cases is briefly discussed.

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STRING EFFECTIVE ACTION AND TWO-DIMENSIONAL CHARGED BLACK HOLE

Modern Physics Letters A ◽

10.1142/s0217732391003882 ◽

1991 ◽

Vol 06 (36) ◽

pp. 3365-3371 ◽

Cited By ~ 17

Author(s):

S. PRATIK KHASTGIR ◽

ALOK KUMAR

Keyword(s):

Black Hole ◽

Effective Action ◽

Three Dimensional ◽

Background Field ◽

Space Time ◽

Charged Black Hole ◽

Field Equations ◽

Antisymmetric Tensor Field ◽

Two Space Dimensions ◽

Three Space

Graviton-dilaton background field equations in three space-time dimensions, following from the string effective action are solved when the metric has only time dependence. By taking one of the two space dimensions as compact, our solution reproduces a recently discovered charged black hole solution in two space-time dimensions. Solutions in the presence of non-vanishing three-dimensional background antisymmetric tensor field are also discussed.

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Strong cosmic censorship in charged black-hole spacetimes: As strong as ever

Nuclear Physics B ◽

10.1016/j.nuclphysb.2019.03.003 ◽

2019 ◽

Vol 941 ◽

pp. 636-645 ◽

Cited By ~ 24

Author(s):

Shahar Hod

Keyword(s):

Black Hole ◽

Cosmic Censorship ◽

Charged Black Hole ◽

Black Hole Spacetimes ◽

Strong Cosmic Censorship

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Cylindrically symmetric unimodular f(R) black holes

International Journal of Geometric Methods in Modern Physics ◽

10.1142/s0219887821501012 ◽

2021 ◽

pp. 2150101

Author(s):

Hüseyi̇n Aydın ◽

Meli̇s Ulu Dog̃ru

Keyword(s):

Black Hole ◽

Scalar Field ◽

Equations Of Motion ◽

Energy Conditions ◽

Massless Scalar ◽

Massless Scalar Field ◽

De Sitter ◽

Field Equations ◽

Black Hole Spacetimes ◽

Cylindrically Symmetric

In this paper, we examine massless scalar field by using unimodular [Formula: see text] theory. It is taken into account unimodular and cylindrically symmetric spacetime which provides convenience in researching black hole. The field equations in unimodular [Formula: see text] theory for given spacetime with massless scalar field and additional Bianchi identities are solved. Cylindrically symmetric anti-de Sitter (AdS)–Schwarzschild-like and AdS–Reissner–Nordström-like black hole spacetimes are achieved. Equations of motion are derived by using Hamiltonian. Orbits of massless test particles are depicted. Obtained line element asymptotically converges to dS/AdS spacetime. Weak and strong energy conditions of the massless scalar field are obtained with Raychaudhuri equations in unimodular [Formula: see text] theory. Also, stiff fluid interpretation of scalar field is reviewed.

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Vaccum polarization effects on quasinormal modes in electrically charged black hole spacetimes

10.22323/1.081.0060 ◽

2009 ◽

Author(s):

Jeferson de Oliveira ◽

Owen Pavel Fernandez Piedra

Keyword(s):

Black Hole ◽

Quasinormal Modes ◽

Charged Black Hole ◽

Polarization Effects ◽

Black Hole Spacetimes ◽

Electrically Charged

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Geodesic motion inR-charged black hole spacetimes

Physical Review D ◽

10.1103/physrevd.92.084023 ◽

2015 ◽

Vol 92 (8) ◽

Cited By ~ 7

Author(s):

Rashmi Uniyal ◽

Hemwati Nandan ◽

Anindya Biswas ◽

K. D. Purohit

Keyword(s):

Black Hole ◽

Charged Black Hole ◽

Geodesic Motion ◽

Black Hole Spacetimes

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On the gravitational entropy of accelerating black holes

International Journal of Modern Physics D ◽

10.1142/s0218271820500340 ◽

2020 ◽

Vol 29 (05) ◽

pp. 2050034

Author(s):

Sarbari Guha ◽

Samarjit Chakraborty

Keyword(s):

Black Holes ◽

Black Hole ◽

Phenomenological Approach ◽

Entropy Density ◽

Charged Black Hole ◽

Einstein Field Equations ◽

Field Equations ◽

Gravitational Entropy ◽

Definition Of ◽

Black Hole Solutions

In this paper, we have examined the validity of a proposed definition of gravitational entropy in the context of accelerating black hole solutions of the Einstein field equations, which represent the realistic black hole solutions. We have adopted a phenomenological approach proposed in Rudjord et al. [Phys. Scr. 77, 055901 (2008)] and expanded by Romero et al. [Int. J. Theor. Phys. 51, 925 (2012)], in which the Weyl curvature hypothesis is tested against the expressions for the gravitational entropy. Considering the [Formula: see text]-metric for the accelerating black holes, we have evaluated the gravitational entropy and the corresponding entropy density for four different types of black holes, namely, nonrotating black hole, nonrotating charged black hole, rotating black hole and rotating charged black hole. We end up by discussing the merits of such an analysis and the possible reason of failure in the particular case of rotating charged black hole and comment on the possible resolution of the problem.

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