2025
Restrictions on Regularized Fisher and Dilatonic Spacetimes Implied by High-Frequency Quasiperiodic Oscillations Observed in Microquasars and Active Galactic Nuclei
VRBA, Jaroslav and Zdeněk STUCHLÍKBasic information
Original name
Restrictions on Regularized Fisher and Dilatonic Spacetimes Implied by High-Frequency Quasiperiodic Oscillations Observed in Microquasars and Active Galactic Nuclei
Authors
Edition
Physics of the Dark Universe, 2025, 2212-6864
Other information
Language
English
Type of outcome
Article in a journal
Field of Study
10308 Astronomy
Country of publisher
Switzerland
Confidentiality degree
is not subject to a state or trade secret
References:
Impact factor
Impact factor: 6.400 in 2024
Organization unit
Institute of physics in Opava
UT WoS
001453086700001
EID Scopus
2-s2.0-105001132492
Keywords in English
Fisher and Dilatonic regularized spacetime;quasiperiodic oscilation;microquasars;supermassive black holes
Tags
International impact, Reviewed
Changed: 14/1/2026 10:33, Mgr. Pavlína Jalůvková
Abstract
In the original language
The Bronnikov generalization of the Fisher naked singularity and Dilatonic black hole spacetimes attracts high interest, as it combines two fundamental transitions of the solutions of Einstein equations. These are the black hole/wormhole "black bounce" transition of geometry, and the phantom/canonical transition of the scalar field, called trapped ghost scalar, combined with an electromagnetic field described by a non-linear electrodynamics. In the present paper, we put restrictions on the parameters of the Fisher (wormhole) and Dilatonic (black hole or wormhole) regularized spacetimes by using frequencies of the epicyclic orbital motion in the geodesic model for explanation of the high-frequency oscillations observed in microquasars or active galactic nuclei, where stellar mass or supermassive black holes are usually assumed.