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

@article{65842,
   author = {Konoplya, Roman and Zinhailo, Antonina Frantsivna and Kunz, J. and Stuchlík, Zdeněk and Zhidenko, A.},
   article_location = {GB - Spojené království Velké Británie a},
   article_number = {10},
   doi = {http://dx.doi.org/10.1088/1475-7516/2022/10/091},
   keywords = {Gravitational waves in GR and beyond; theory; modified gravity},
   language = {eng},
   issn = {1475-7516},
   journal = {Journal of Cosmology and Astroparticle Physics},
   title = {Quasinormal ringing of regular black holes in asymptotically safe gravity : the importance of overtones},
   url = {https://iopscience.iop.org/article/10.1088/1475-7516/2022/10/091},
   volume = {2022},
   year = {2022}
}

TY  - JOUR
ID  - 65842
AU  - Konoplya, Roman - Zinhailo, Antonina Frantsivna - Kunz, J. - Stuchlík, Zdeněk - Zhidenko, A.
PY  - 2022
TI  - Quasinormal ringing of regular black holes in asymptotically safe gravity : the importance of overtones
JF  - Journal of Cosmology and Astroparticle Physics
VL  - 2022
IS  - 10
SP  - "091-1"-"091-21"
EP  - "091-1"-"091-21"
SN  - 14757516
KW  - Gravitational waves in GR and beyond
KW  - theory
KW  - modified gravity
UR  - https://iopscience.iop.org/article/10.1088/1475-7516/2022/10/091
N2  - 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 identi-fication parameter. The two cases of identification are considered here: first, by the mod-ified 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 stud-ied, 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.
ER  - 

KONOPLYA, Roman, Antonina Frantsivna ZINHAILO, J. KUNZ, Zdeněk STUCHLÍK a A. ZHIDENKO. Quasinormal ringing of regular black holes in asymptotically safe gravity : the importance of overtones. \textit{Journal of Cosmology and Astroparticle Physics}. GB - Spojené království Velké Británie a, 2022, roč.~2022, č.~10, s.~''091-1''-''091-21'', 21 s. ISSN~1475-7516. Dostupné z: https://dx.doi.org/10.1088/1475-7516/2022/10/091.