How general is the strong cosmic censorship bound for quasinormal modes?

Konoplya, R. A.; Zhidenko, A.

doi:10.1088/1475-7516/2022/11/028

Cited by 13 publications

(5 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this section the parametrization suggested initially for D = 4 asymptotically de Sitter black holes in [36] is reviewed with the minimal specifications concerning the AdS asymptotic, while for more interesting D = 5 case we generalize the approach of [37] allowing now for a non-zero Λ-term.…”

Section: General Parametrized Spherically Symmetric Black Hole In Ads...mentioning

confidence: 99%

See 1 more Smart Citation

Quasinormal ringing of regular black holes in asymptotically safe gravity: the importance of overtones

Konoplya

Zinhailo

Kunz

et al. 2022

J. Cosmol. Astropart. Phys.

Self Cite

View full text Add to dashboard Cite

Asymptotically safe gravity is based on the idea that the main contribution to the Schwarzschild-like black hole spacetime is due to the value of the gravitational coupling which depends on the distance from the origin and approaches its classical value in the far zone. However, at some stage this approach has an arbitrariness of choice of some identification parameter. The two cases of identification are considered here: first, by the modified proper length (the Bonanno-Reuter metric), and second, by the Kretschmann scalar (the metric for this case coincides, up to the redefinition of constants, with the Hayward metric). Even though the quasinormal modes of these metrics have been extensively studied, a number of interesting points were missed. We have found that quasinormal modes are qualitatively similar for both types of identification. The deviation of the fundamental mode from its Schwarzschild limit may be a few times larger than it was claimed in the previous studies. The striking deviation from the Schwarzschild limit occurs for overtones, being as large as hundreds of percent even when the fundamental mode is almost coinciding with the Schwarzschild one. This happens because the above metrics are very close to the Schwarzschild one everywhere, except a small region near the event horizon, which is crucial for overtones. The spectrum of both metrics contains purely imaginary (non-oscillatory) modes, which, for some values of parameters, can appear already at the second overtone.

show abstract

Section: General Parametrized Spherically Symmetric Black Hole In Ads...mentioning

confidence: 99%

“…Here we will use the general parametrization of spherically symmetric black holes in metric theories of gravity [20], which was extended for the non asymptotically flat backgrounds in [36]. The metric of a spherically symmetric black hole can be written in the following general form,…”

Section: General Parametrized Spherically Symmetric Black Hole In Ads...mentioning

confidence: 99%

Quasinormal ringing of regular black holes in asymptotically safe gravity: the importance of overtones

Konoplya

Zinhailo

Kunz

et al. 2022

J. Cosmol. Astropart. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The study of this conjecture in the structure of three-dimensional black strings has also carried interesting results, which you can see [5] for a deeper study. Also, you can see [6][7][8][9] for further study. The effectiveness of mass-inflation systems, which are involved in the transformations of the inner Cauchy horizon associated with the space-time of black holes that are approximately flat, which is pathological in the estimation of SCC, into a series of hypersurfaces which is singular non-extendable.…”

Section: Jhep02(2023)236mentioning

confidence: 99%

Strong cosmic censorship in light of weak gravity conjecture for charged black holes

Sadeghi

Alipour

Gashti

2023

J. High Energ. Phys.

View full text Add to dashboard Cite

In this paper, we investigate the strong cosmic censorship conjecture (SCC) for charged black holes in the de Sitter space by considering the weak gravity conjecture (WGC). Using analytical methods, we find that the SCC is preserved for dS-charged black holes with respect to some restriction qQ » 1 and r+≥ Q with the help of the WGC condition viz $$ \frac{q}{m} $$ q m ≥ 1 for scalar fields. Where q, m are the charge and mass of the scalar field, and r+, Q determine the radius of the outer event horizon and the charge of the black hole, respectively. In that case, when the (WGC) is valid, SCC will definitely be satisfied for the dS-charged black holes. On the other hand, the SCC is violated when the WGC is not satisfied. Also, we examined the RN-dS charged black hole in the extremality state and found that SCC can be violated with the condition $$ \Lambda {r}_{+}^2 $$ Λ r + 2 = 1.

show abstract

“…The study of this conjecture in the structure of three-dimensional black strings has also carried interesting results, which you can see [5] for a deeper study. Studying the validity and violation of this conjecture in many recent studies in different conditions and frameworks has led to exciting results that you can see [6][7][8][9] for further study. Therefore, in this article, we want to study a different structure of this conjecture.…”

Section: Introductionmentioning

confidence: 96%

Strong Cosmic Censorship in light of Weak Gravity Conjecture for Charged Black Holes

Sadeghi¹,

Alipour²,

Gashti³

2023

Preprint

View full text Add to dashboard Cite

In this paper, we investigate the strong cosmic censorship conjecture (SCC) for charged black holes in the de Sitter space by considering the weak gravity conjecture (WGC). Using analytical methods, we find that the SCC is preserved for dS-charged black holes with respect to some restriction qQ ≫ 1 and r + ≥ Q with the help of the WGC condition viz q m ≥ 1 for scalar fields. Where q, m are the charge and mass of the scalar field, and r + , Q determine the radius of the outer event horizon and the charge of the black hole, respectively. In that case, when the (WGC) is valid, SCC will definitely be satisfied for the dS-charged black holes. On the other hand, the SCC is violated when the WGC is not satisfied. Also, we examined the RN-dS charged black hole in the extremality state and found that SCC can be violated with the condition Λr 2 + = 1.

show abstract

How general is the strong cosmic censorship bound for quasinormal modes?

Cited by 13 publications

References 44 publications

Quasinormal ringing of regular black holes in asymptotically safe gravity: the importance of overtones

Quasinormal ringing of regular black holes in asymptotically safe gravity: the importance of overtones

Strong cosmic censorship in light of weak gravity conjecture for charged black holes

Strong Cosmic Censorship in light of Weak Gravity Conjecture for Charged Black Holes

Contact Info

Product

Resources

About