Detailed Information on Publication Record
2024
Testing alternative spacetimes by high-frequency quasi-periodic oscillations observed in microquasars and active galactic nuclei
SHAHZADI, Misbah, Martin KOLOŠ, Rabia SALEEM and Zdeněk STUCHLÍKBasic information
Original name
Testing alternative spacetimes by high-frequency quasi-periodic oscillations observed in microquasars and active galactic nuclei
Authors
SHAHZADI, Misbah, Martin KOLOŠ (203 Czech Republic, belonging to the institution), Rabia SALEEM and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)
Edition
Classical and Quantum Gravity, GB - Spojené království Velké Británie a, 2024, 0264-9381
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
Impact factor
Impact factor: 3.500 in 2022
Organization unit
Institute of physics in Opava
UT WoS
001185365900001
Keywords in English
black hole physics;modified theories of gravity;quasi-periodic oscillations
Tags
Tags
International impact, Reviewed
Links
GA23-07043S, research and development project.
Změněno: 29/1/2025 11:22, Mgr. Pavlína Jalůvková
Abstract
V originále
In this article, we try to capture the influence of deviation from standard Kerr black hole (BH) spacetime on observed high-frequency quasi-periodic oscillations (QPOs) signal. We explore the dynamics of test particles in the field of rotating compact objects governed by the various modifications of the standard Kerr BH spacetime and apply the model of epicyclic oscillations of Keplerian discs to the observed microquasars and active galactic nuclei high-frequency QPOs data. We present a generalized formalism for fitting two well-known high-frequency QPO models: the epicyclic resonance model and the relativistic precession model. This is done assuming stationary, axisymmetric, and asymptotically flat spacetimes. Recently, we have used the same set of stationary, axisymmetric, and asymptotically flat spacetimes, and estimated the restrictions of spacetime parameters with the help of hot-spot data of three flares observed at Sgr A* by GRAVITY instrument (Misbah Shahzadi et al 2022 Eur. Phys. J. C 82 407). The aim of this work is not to test a particular theoretical model or to determine and constrain its parameters, but to map a set of well-astrophysically motivated deviations from classical Kerr BH spacetime and demonstrate which ones provide the best fit for high-frequency QPOs data and could be fruitful for future exploration.