Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F22%3AA0000186" target="_blank" >RIV/47813059:19630/22:A0000186 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1140/epjc/s10052-022-10347-4" target="_blank" >https://link.springer.com/article/10.1140/epjc/s10052-022-10347-4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjc/s10052-022-10347-4" target="_blank" >10.1140/epjc/s10052-022-10347-4</a>
Alternative languages
Result language
angličtina
Original language name
Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*
Original language description
We are fitting dynamics of electrically neutral hot-spot orbiting around Sagittarius A* (Sgr A*) source in Galactic center, represented by various modifications of the standard Kerr black hole (BH), to the three flares observed by the GRAVITY instrument on May 27, July 22, July 28, 2018. We consider stationary, axisymmetric, and asymptotically flat spacetimes describing charged BHs in general relativity (GR) combined with nonlinear electrodynamics, or reflecting the influence of dark matter (DM), or in so called parameterized dirty Kerr spacetimes, and test them using the hot-spot data. We show that the orbital frequencies as well as positions of the hot-spots orbiting the considered BHs fit the observed positions and periods of the flare orbits, and give relevant constraints on the parameters of the considered BH spacetimes and the gravity or other theories behind such modified spacetimes.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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)
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>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
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
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Volume of the periodical
82
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
22
Pages from-to
„407-1“-„407-22“
UT code for WoS article
000791400300002
EID of the result in the Scopus database
2-s2.0-85129640432