Quasinormal modes for non-minimally coupled scalar fields in regular black hole spacetimes: Grey-body factors, area spectrum and shadow radius

Yekta, Davood Mahdavian; Karimabadi, Majid; Alavi, S. A.

doi:10.1016/j.aop.2021.168603

Cited by 7 publications

(1 citation statement)

References 98 publications

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“…By now quasinormal modes of various regular black hole models have been extensively studied in a great number of papers [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Even though quasinormal modes of the relatively new Held-Gold-Eichhorn spacetime have not been studied yet, there is an extensive literature on the spectrum of the Hayward solution [33][34][35][36][37] the data for which could be simply re-scaled.…”

Section: Introductionmentioning

confidence: 99%

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

Konoplya,

Zinhailo,

Kunz

et al. 2022

Preprint

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The 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 Held-Gold-Eichhorn metric, which 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.

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Section: Introductionmentioning

confidence: 99%

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

Konoplya,

Zinhailo,

Kunz

et al. 2022

Preprint

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Quasinormal modes of charged black holes in Asymptotically Safe Gravity

Dubinsky

2024

Physics of the Dark Universe

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

Konoplya

Zinhailo

Kunz

et al. 2022

J. Cosmol. Astropart. Phys.

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

Quasinormal modes for non-minimally coupled scalar fields in regular black hole spacetimes: Grey-body factors, area spectrum and shadow radius

Cited by 7 publications

References 98 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

Quasinormal modes of charged black holes in Asymptotically Safe Gravity

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

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