scholarly journals The Inner Cauchy Horizon of Axisymmetric and Stationary Black Holes with Surrounding Matter in Einstein–Maxwell Theory: Study in Terms of Soliton Methods

2009 ◽  
Vol 10 (6) ◽  
pp. 1075-1095 ◽  
Author(s):  
Jörg Hennig ◽  
Marcus Ansorg
Keyword(s):  
Black Holes ◽  
Cauchy Horizon ◽  
Maxwell Theory

Non-inheriting Einstein-Maxwell theory and black holes

2008 ◽  
Vol 30 ◽  
pp. 107-109
Author(s):  
P. Tod
Keyword(s):  
Black Holes ◽  
Maxwell Theory

scholarly journals Causality of black holes in 4-dimensional Einstein–Gauss–Bonnet–Maxwell theory

2020 ◽  
Vol 80 (8) ◽  
Author(s):  
Xian-Hui Ge ◽  
Sang-Jin Sin
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Shear Viscosity ◽  
Upper Bound ◽  
Causal Structure ◽  
Density Ratio ◽  
Entropy Density ◽  
Coupling Constant ◽  
Maxwell Theory ◽  
Black Hole Solutions

Abstract We study charged black hole solutions in 4-dimensional (4D) Einstein–Gauss–Bonnet–Maxwell theory to the linearized perturbation level. We first compute the shear viscosity to entropy density ratio. We then demonstrate how bulk causal structure analysis imposes an upper bound on the Gauss–Bonnet coupling constant in the AdS space. Causality constrains the value of Gauss–Bonnet coupling constant $$\alpha _{GB}$$αGB to be bounded by $$\alpha _{GB}\le 0$$αGB≤0 as $$D\rightarrow 4$$D→4.

scholarly journals TOPOLOGICAL CLASSIFICATION OF BLACK HOLES: GENERIC MAXWELL SET AND CREASE SET OF A HORIZON

2011 ◽  
Vol 20 (06) ◽  
pp. 1095-1122 ◽  
Author(s):  
MASARU SIINO ◽  
TATSUHIKO KOIKE
Keyword(s):  
Black Holes ◽  
Smooth Function ◽  
Singularity Theory ◽  
Topological Classification ◽  
Cauchy Horizon ◽  
Qualitative Properties ◽  
Important Object ◽  
Maxwell Set ◽  
Spatial Section

The crease set of an event horizon or a Cauchy horizon is an important object which determines the qualitative properties of the horizon. In particular, it determines the possible topologies of the spatial sections of the horizon. By Fermat's principle in geometric optics, we relate the crease set and the Maxwell set of a smooth function in the context of singularity theory. We thereby give a classification of generic topological structures of the Maxwell sets and the generic topologies of the spatial section of the horizon.

scholarly journals Charged anti-de Sitter BTZ black holes in Maxwell-f(T) gravity

2018 ◽  
Vol 33 (13) ◽  
pp. 1850076 ◽  
Author(s):  
G. G. L. Nashed ◽  
S. Capozziello
Keyword(s):  
Black Holes ◽  
Special Form ◽  
Energy Content ◽  
Equations Of Motion ◽  
Main Task ◽  
Cauchy Horizon ◽  
De Sitter ◽  
Vector Form ◽  
Charged Case ◽  
General Vector

Inspired by the Bañados, Teitelboim and Zanelli (BTZ) formalism, we discuss the Maxwell-[Formula: see text] gravity in [Formula: see text] dimensions. The main task is to derive exact solutions for a special form of [Formula: see text], with [Formula: see text] being the torsion scalar of Weitzenböck geometry. To this end, a triad field is applied to the equations of motion of charged [Formula: see text] and sets of circularly symmetric noncharged and charged solutions have been derived. We show that, in the charged case, the monopole-like and the [Formula: see text] terms are linked by a correlative constant despite the known results in teleparallel geometry and its extensions.[Formula: see text] Furthermore, it is possible to show that the event horizon is not identical with the Cauchy horizon due to such a constant. The singularities and the horizons of these black holes are examined: they are new and have no analogue in the literature due to the fact that their curvature singularities are soft. We calculate the energy content of these solutions by using the general vector form of the energy–momentum within the framework of [Formula: see text] gravity. Finally, some thermodynamical quantities, like entropy and Hawking temperature, are derived.

scholarly journals Conserved charges and black holes in the Einstein-Maxwell theory on AdS3 reconsidered

2015 ◽  
Vol 2015 (10) ◽  
Author(s):  
Alfredo Pérez ◽  
Miguel Riquelme ◽  
David Tempo ◽  
Ricardo Troncoso
Keyword(s):  
Black Holes ◽  
Maxwell Theory ◽  
Conserved Charges

Instabilities of the Cauchy horizon in Kerr black holes

1994 ◽  
Vol 50 (2) ◽  
pp. 841-845 ◽  
Author(s):  
D. A. Konkowski ◽  
T. M. Helliwell
Keyword(s):  
Black Holes ◽  
Cauchy Horizon ◽  
Kerr Black Holes
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