Quasinormal modes and grey-body factors of regular black holes with a scalar hair from the Effective Field Theory

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F23%3AA0000282" target="_blank" >RIV/47813059:19630/23:A0000282 - isvavai.cz</a>

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1475-7516/2023/07/001" target="_blank" >https://iopscience.iop.org/article/10.1088/1475-7516/2023/07/001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1475-7516/2023/07/001" target="_blank" >10.1088/1475-7516/2023/07/001</a>

Result language

angličtina

Original language name

Quasinormal modes and grey-body factors of regular black holes with a scalar hair from the Effective Field Theory

Original language description

The Effective Field Theory (EFT) of perturbations on an arbitrary background geometry with a timelike scalar profile has been recently constructed in the context of scalar -tensor theories. Unlike General Relativity, the regular Hayward metric is realized as an exact background metric in the Effective Field Theory with timelike scalar profile without resorting to special matter field, such as nonlinear electrodynamics. The fundamental quasinormal mode for axial graviational perturbations of this black hole has been considered recently with the help of various methods. Here we make a further step in this direction and find that, unlike the fundamental mode, a few first overtones deviate from their Schwarzschild limit at a much higher rate. This outburst of overtones occurs because the overtones are extremely sensitive to the least change of the near-horizon geometry. The analytical formula for quasinormal modes is obtained in the eikonal regime. In addition, we calculated grey-body factors and showed that the regular Hayward black hole with a scalar hair has a smaller grey-body factor than the Schwarzschild one. Integration of the wave-like equation in the time-domain shows that the power-law tails, following the ring-down phase, are indistinguishable from the Schwarzschild ones at late times.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Cosmology and Astroparticle Physics

ISSN

1475-7516

e-ISSN

—

Volume of the periodical

2023

Issue of the periodical within the volume

7

Country of publishing house

GB - UNITED KINGDOM

Number of pages

15

Pages from-to

„001-1“-„001-15“

UT code for WoS article

001108894900010

EID of the result in the Scopus database

2-s2.0-85164616991