Dilaton black holes with a cosmological term

1999 ◽  
Vol 41 (2) ◽  
pp. 198-216 ◽  
Author(s):  
David L. Wiltshire
Keyword(s):  
Black Holes ◽  
Cosmological Constant ◽  
Cosmological Term ◽  
Spherically Symmetric ◽  
Dilaton Black Holes

AbstractThe properties of static spherically symmetric black holes, which carry electric and magnetic charges, and which are coupled to the dilaton in the presence of a cosmological constant, A, are reviewed.

scholarly journals HORIZONS IN MATTER: BLACK HOLE HAIR VERSUS NULL BIG BANG

2009 ◽  
Vol 18 (14) ◽  
pp. 2283-2287 ◽  
Author(s):  
K. A. BRONNIKOV ◽  
OLEG B. ZASLAVSKII
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Cosmological Constant ◽  
Cosmic Strings ◽  
Density Ratio ◽  
Radial Pressure ◽  
Big Bang ◽  
Spherically Symmetric ◽  
Normal Matter ◽  
Phantom Matter

It is shown that only particular kinds of matter (in terms of the "radial" pressure-to-density ratio w) can coexist with Killing horizons in black hole or cosmological space–times. Thus, for arbitrary (not necessarily spherically symmetric) static black holes, admissible are vacuum matter (w = −1, i.e. the cosmological constant or its generalization with the same value of w) and matter with certain values of w between 0 and −1, in particular a gas of disordered cosmic strings (w = −1/3). If the cosmological evolution starts from a horizon (the so-called null big bang scenarios), this horizon can coexist with vacuum matter and certain kinds of phantom matter with w ≤ −3. It is concluded that normal matter in such scenarios is entirely created from vacuum.

Thermodynamics and geometrothermodynamics of Born–Infeld black holes with cosmological constant

2015 ◽  
Vol 24 (11) ◽  
pp. 1550092
Author(s):  
Hernando Quevedo ◽  
María N. Quevedo ◽  
Alberto Sánchez
Keyword(s):  
Phase Transition ◽  
Black Holes ◽  
Cosmological Constant ◽  
Thermodynamic System ◽  
Physical Parameters ◽  
Spherically Symmetric ◽  
Transition Structure ◽  
Thermodynamic Variable ◽  
Thermodynamic Variables ◽  
Range Of Values

In this paper, we investigate a class of spherically symmetric Born–Infeld black holes which contains the mass, electric charge, Born–Infeld parameter and the cosmological constant as physical parameters. We show that for the mass to be an extensive thermodynamic variable, it is necessary to consider the cosmological constant and the Born–Infeld parameter as thermodynamic variables as well. We analyze the properties of such a thermodynamic system, explore the range of values where the system is thermodynamically well-defined, and the phase transition structure. In addition, we show that the equilibrium manifold in the context of geometrothermodynamics reproduces correctly the thermodynamic properties of this black hole class.

scholarly journals Fermions tunneling from charged anti-de Sitter black holes

2012 ◽  
Vol 90 (9) ◽  
pp. 903-909 ◽  
Author(s):  
Muhammad Sharif ◽  
Wajiha Javed
Keyword(s):  
Black Holes ◽  
Dirac Equation ◽  
Cosmological Constant ◽  
Hawking Radiation ◽  
Charged Particles ◽  
De Sitter ◽  
Event Horizons ◽  
Horizon Radius ◽  
Fermions Tunneling ◽  
Dilaton Black Holes

We study Hawking radiation as a phenomenon of tunneling through event horizons of charged torus-like as well as dilaton black holes involving a cosmological constant based on Kerner and Mann’s formulation. We obtain tunneling probabilities as well as Hawking’s emission temperature of outgoing charged particles by applying the semiclassical Wentzel–Kramers–Brillouin approximation to the general covariant Dirac equation. The graphical behavior of Hawking temperature and horizon radius is investigated. We find results consistent with those already given in the literature.

scholarly journals Global Embeddings of BTZ and Schwarzschild-ADS Type Black Holes in a Flat Space

Symmetry ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 841 ◽  
Author(s):  
Anton Sheykin ◽  
Dmitry Solovyev ◽  
Sergey Paston
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Cosmological Constant ◽  
Isometric Embedding ◽  
Flat Space ◽  
Ambient Space ◽  
Spherically Symmetric ◽  
Btz Black Hole ◽  
3 Dimensional ◽  
Negative Cosmological Constant

We study the problem of construction of global isometric embedding for spherically symmetric black holes with negative cosmological constant in various dimensions. Firstly, we show that there is no such embedding for 4D RN-AdS black hole in 6D flat ambient space, completing the classification which we started earlier. Then we construct an explicit embedding of non-spinning BTZ black hole in 6D flat ambient space. Using this embedding as an anzats, we then construct a global explicit embedding of d-dimensional Schwarzschild-AdS black hole in a flat ( d + 3 ) -dimensional ambient space.

scholarly journals ENERGY ASSOCIATED WITH CHARGED DILATON BLACK HOLES

1996 ◽  
Vol 05 (03) ◽  
pp. 251-256 ◽  
Author(s):  
A. CHAMORRO ◽  
K.S. VIRBHADRA
Keyword(s):  
Black Holes ◽  
Energy Distribution ◽  
Total Energy ◽  
Free Parameter ◽  
Coupling Parameter ◽  
Radial Distance ◽  
Maxwell Field ◽  
Spherically Symmetric ◽  
Dilaton Black Holes

It is known that certain properties of charged dilaton black holes depend on a free parameter β which controls the strength of the coupling of the dilaton to the Maxwell field. We obtain the energy associated with static spherically symmetric charged dilaton black holes for arbitrary value of the coupling parameter and find that the energy distribution depends on the value of β. With increasing radial distance, the energy in a sphere increases for β=0 as well as for β<1, decreases for β>1, and remains constant for β=1. However, the total energy turns out to be the same for all values of β.

scholarly journals ENERGY DISTRIBUTION OF CHARGED DILATON BLACK HOLES

1998 ◽  
Vol 07 (05) ◽  
pp. 773-777 ◽  
Author(s):  
S. S. XULU
Keyword(s):  
Black Holes ◽  
Energy Distribution ◽  
Total Energy ◽  
Coupling Parameter ◽  
Maxwell Field ◽  
Spherically Symmetric ◽  
Momentum Complex ◽  
Dilaton Black Holes

Chamorro and Virbhadra studied, using the energy-momentum complex of Einstein, the energy distribution associated with static spherically symmetric charged dilaton black holes for an arbitrary value of the coupling parameter γ which controls the strength of the dilaton to the Maxwell field. We study the same in Tolman's prescription and get the same result as obtained by Chamorro and Virbhadra. The energy distribution of charged dilaton black holes depends on the value of γ and the total energy is independent of this parameter.

scholarly journals Charged dilaton black holes with a cosmological constant

1995 ◽  
Vol 51 (10) ◽  
pp. 5720-5724 ◽  
Author(s):  
S. J. Poletti ◽  
J. Twamley ◽  
D. L. Wiltshire
Keyword(s):  
Black Holes ◽  
Cosmological Constant ◽  
Dilaton Black Holes

scholarly journals Bootstrapped Newtonian Cosmology and the Cosmological Constant Problem

Symmetry ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 358
Author(s):  
Roberto Casadio ◽  
Andrea Giusti
Keyword(s):  
Black Holes ◽  
Cosmological Constant ◽  
Quantum Cosmology ◽  
Quantum Physics ◽  
Gravitational Interaction ◽  
Newtonian Gravity ◽  
Cosmological Constant Problem ◽  
Newtonian Cosmology ◽  
Natural Solution ◽  
The Impact

Bootstrapped Newtonian gravity was developed with the purpose of estimating the impact of quantum physics in the nonlinear regime of the gravitational interaction, akin to corpuscular models of black holes and inflation. In this work, we set the ground for extending the bootstrapped Newtonian picture to cosmological spaces. We further discuss how such models of quantum cosmology can lead to a natural solution to the cosmological constant problem.

Sign in / Sign up

Export Citation Format

Share Document