Quasinormal modes, stability and shadows of a black hole in the 4D Einstein-Gauss-Bonnet gravity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F20%3AA0000008" target="_blank" >RIV/47813059:19630/20:A0000008 - isvavai.cz</a>
Result on the web
<a href="https://epjc.epj.org/articles/epjc/abs/2020/11/10052_2020_Article_8639/10052_2020_Article_8639.html" target="_blank" >https://epjc.epj.org/articles/epjc/abs/2020/11/10052_2020_Article_8639/10052_2020_Article_8639.html</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjc/s10052-020-08639-8" target="_blank" >10.1140/epjc/s10052-020-08639-8</a>
Alternative languages
Result language
angličtina
Original language name
Quasinormal modes, stability and shadows of a black hole in the 4D Einstein-Gauss-Bonnet gravity
Original language description
Recently a D-dimensional regularization approach leading to the non-trivial (3 + 1)-dimensional Einstein-Gauss-Bonnet (EGB) effective description of gravity was formulated which was claimed to bypass the Lovelock's theorem and avoid Ostrogradsky instability. Later it was shown that the regularization is possible only for some broad, but limited, class of metrics and Aoki et al. (arXiv:2005.03859) formulated a well-defined four-dimensional EGB theory, which breaks the Lorentz invariance in a theoretically consistent and observationally viable way. The black-hole solution of the first naive approach proved out to be also the exact solution of the well-defined theory. Here we calculate quasi-normal modes of scalar, electromagnetic and gravitational perturbations and find the radius of shadow for spherically symmetric and asymptotically flat black holes with Gauss-Bonnet corrections. We show that the black hole is gravitationally stable when (-16M(2) < alpha less than or similar to 0.6M(2)). The instability in the outer range is the eikonal one and it develops at high multipole numbers. The radius of the shadow R-Sh obeys the linear law with a remarkable accuracy.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
<a href="/en/project/GA19-03950S" target="_blank" >GA19-03950S: Testing strong gravity via black holes</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
European Physical Journal C
ISSN
1434-6044
e-ISSN
1434-6052
Volume of the periodical
80
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
„1049-1“-„1049-13“
UT code for WoS article
000593720200003
EID of the result in the Scopus database
2-s2.0-85095955055