Stability of asymptotically de Sitter and anti-de Sitter black holes in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1742" altimg="si2.svg"><mml:mrow><mml:mn>4</mml:mn><mml:mi>D</mml:mi></mml:mrow></mml:math> regularized Einstein–Gauss–Bonnet theory

Cuyubamba, M. A.

doi:10.1016/j.dark.2021.100789

Cited by 12 publications

(5 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This four-dimensional Einstein-Gauss-Bonnet gravity theory was further improved and a consistent theory was proposed in [58]. The generalization to other black hole solutions are referred to [59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78].…”

Section: (): V-volmentioning

confidence: 99%

The correspondence between shadow and test field in a four-dimensional charged Einstein–Gauss–Bonnet black hole

et al. 2021

View full text Add to dashboard Cite

In this paper, we investigate the photon sphere, shadow radius and quasinormal modes of a four-dimensional charged Einstein–Gauss–Bonnet black hole. The perturbation of a massless scalar field in the black hole’s background is adopted. The quasinormal modes are gotten by the 6th order WKB approximation approach and shadow radius, respectively. When the value of the Gauss–Bonnet coupling constant increase, the values of the real parts of the quasinormal modes increase and those of the imaginary parts decrease. The coincidence degrees of quasinormal modes derived by the two approaches increases with the increase of the values of the Gauss–Bonnet coupling constant and multipole number. It shows the correspondence between the shadow and test field in the four-dimensional Einstein–Gauss–Bonnet–Maxwell gravity. The radii of the photon sphere and shadow increase with the decrease of the Gauss–Bonnet coupling constant.

show abstract

Section: (): V-volmentioning

confidence: 99%

The correspondence between shadow and test field in a four-dimensional charged Einstein–Gauss–Bonnet black hole

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In 4DEGB gravity, the stability of BHs has been discussed in Refs. [56][57][58][59] by paying particular attention to the behavior of perturbations along the radial direction.…”

Section: Introductionmentioning

confidence: 99%

Instability of hairy black holes in regularized 4-dimensional Einstein-Gauss-Bonnet gravity

Tsujikawa

2022

Preprint

View full text Add to dashboard Cite

In regularized 4-dimensional Einstein-Gauss-Bonnet (EGB) gravity derived from a Kaluza-Klein reduction of higher-dimensional EGB theory, we study the existence and stability of black hole (BH) solutions on a static and spherically symmetric background. We show that asymptotically-flat hairy BH solutions realized for a flat internal maximally symmetric space are unstable against linear perturbations for any rescaled GB coupling constant. The propagation of even-parity perturbations for high angular momentum modes plays a crucial role to reach the conclusion of BH instability in the vicinity of an event horizon.

show abstract

“…For instance, charged and rotating 4D EGB BH solutions [42][43][44], BH solutions in Lovelock gravity [45,46], BH solutions surrounded by clouds of strings [47], Bardeen BHs [48], Hayward BHs [49], spherically symmetric and thin shell wormhole solutions [50,51] and relativistic stars [52] have been extensively studied. Also, a large number of interesting aspects of the theory including geodesic motion and shadow [53][54][55][56], strong and weak gravitational lensing [57][58][59][60], quasinormal modes of BHs [61][62][63][64][65], instability of (A)dS BHs [66][67][68], thermodynamics and phase transition [69][70][71][72], Hawking radiation [73,74] and new quark stars [75,76] have also been stud-ied. For further references on 4D EGB gravity see [77][78][79][80][81][82][83][84][85][86][87]…”

Section: Introductionmentioning

confidence: 99%

Thin accretion disks around rotating black holes in 4D Einstein–Gauss–Bonnet gravity

Heydari-Fard

Sepangi

2021

Eur. Phys. J. C

View full text Add to dashboard Cite

Recently, Kumar and Ghosh have derived Kerr-like rotating black hole solutions in the framework of four-dimensional Einstein–Gauss–Bonnet theory of gravity and investigated the black hole shadow. Using the steady-state Novikov–Thorne model, we study thin accretion disk processes for such rotating black holes including the energy flux, temperature distribution, emission spectrum, energy conversion efficiency as well as the radius of the innermost stable circular orbit. We also study the effects of the Gauss–Bonnet coupling parameter $$\alpha $$ α on these quantities. The results are compared to slowly rotating relativistic Kerr black holes which show that for a positive Gauss–Bonnet coupling, thin accretion disks around rotating black holes in four-dimensional Einstein–Gauss–Bonnet gravity are hotter and more efficient than that for Kerr black holes with the same rotation parameter a, while for a negative coupling they are cooler and less efficient. Thus the accretion disk processes may be considered as tools for testing Einstein–Gauss–Bonnet gravity using astrophysical observations.

show abstract

Stability of asymptotically de Sitter and anti-de Sitter black holes in 4D regularized Einstein–Gauss–Bonnet theory

Cited by 12 publications

References 50 publications

The correspondence between shadow and test field in a four-dimensional charged Einstein–Gauss–Bonnet black hole

The correspondence between shadow and test field in a four-dimensional charged Einstein–Gauss–Bonnet black hole

Instability of hairy black holes in regularized 4-dimensional Einstein-Gauss-Bonnet gravity

Thin accretion disks around rotating black holes in 4D Einstein–Gauss–Bonnet gravity

Contact Info

Product

Resources

About