Detailed Information on Publication Record
2024
Epicyclic Oscillations and Circular Orbits in Hairy Black Holes: Testing by High-Frequency Quasi-Periodic Oscillations Observed in Microquasars
VRBA, JaroslavBasic information
Original name
Epicyclic Oscillations and Circular Orbits in Hairy Black Holes: Testing by High-Frequency Quasi-Periodic Oscillations Observed in Microquasars
Authors
VRBA, Jaroslav (203 Czech Republic, guarantor, belonging to the institution)
Edition
Physics of the Dark Universe, 2024, 2212-6864
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
Switzerland
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
Impact factor
Impact factor: 5.500 in 2022
Organization unit
Institute of physics in Opava
UT WoS
001151079600001
Keywords in English
hairy spacetime;high-frequency quasi-periodic oscillations;microquasar
Tags
Tags
International impact, Reviewed
Změněno: 16/1/2025 12:07, Mgr. Pavlína Jalůvková
Abstract
V originále
Recently, Ovalle and his collaborators proposed an exact solution to Einstein's equations. In this study, we investigate the main characteristics of the spherically symmetric spacetime determined by the hair parameter l, with a specific focus on circular orbits, particularly the innermost circular orbits (ISCOs), and the epicyclic oscillatory motion along these orbits. To assess the validity of this novel geometry, we employ the frequencies derived from the epicyclic resonance model of high-frequency quasi-periodic oscillations (HF QPOs) observed in microquasars, as well as the ISCOs. By analyzing the observed data from three selected microquasars, we establish constraints on the parameter l. Our findings suggest that this geometric framework can encompass the phenomena associated with HF QPOs and offer a partial explanation for the observed shift in the ISCOs, which is commonly attributed to the rotation of the black hole.