Restrictions on Regularized Fisher and Dilatonic Spacetimes Implied by High-Frequency Quasiperiodic Oscillations Observed in Microquasars and Active Galactic Nuclei
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/canonic...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
|
| Series: | Universe |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-1997/11/3/99 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850280225677508608 |
|---|---|
| author | Jaroslav Vrba Zdeněk Stuchlík |
| author_facet | Jaroslav Vrba Zdeněk Stuchlík |
| author_sort | Jaroslav Vrba |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-e6ded29ae8e14617bbfd8a9206207a4a |
| institution | OA Journals |
| issn | 2218-1997 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj-art-e6ded29ae8e14617bbfd8a9206207a4a2025-08-20T01:48:50ZengMDPI AGUniverse2218-19972025-03-011139910.3390/universe11030099Restrictions on Regularized Fisher and Dilatonic Spacetimes Implied by High-Frequency Quasiperiodic Oscillations Observed in Microquasars and Active Galactic NucleiJaroslav Vrba0Zdeněk Stuchlík1Research Centre of Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech RepublicResearch Centre of Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech RepublicThe 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.https://www.mdpi.com/2218-1997/11/3/99Fisher and Dilatonic regularized spacetimequasiperiodic oscilationmicroquasarssupermassive black holes |
| spellingShingle | Jaroslav Vrba Zdeněk Stuchlík Restrictions on Regularized Fisher and Dilatonic Spacetimes Implied by High-Frequency Quasiperiodic Oscillations Observed in Microquasars and Active Galactic Nuclei Universe Fisher and Dilatonic regularized spacetime quasiperiodic oscilation microquasars supermassive black holes |
| title | Restrictions on Regularized Fisher and Dilatonic Spacetimes Implied by High-Frequency Quasiperiodic Oscillations Observed in Microquasars and Active Galactic Nuclei |
| title_full | Restrictions on Regularized Fisher and Dilatonic Spacetimes Implied by High-Frequency Quasiperiodic Oscillations Observed in Microquasars and Active Galactic Nuclei |
| title_fullStr | Restrictions on Regularized Fisher and Dilatonic Spacetimes Implied by High-Frequency Quasiperiodic Oscillations Observed in Microquasars and Active Galactic Nuclei |
| title_full_unstemmed | Restrictions on Regularized Fisher and Dilatonic Spacetimes Implied by High-Frequency Quasiperiodic Oscillations Observed in Microquasars and Active Galactic Nuclei |
| title_short | Restrictions on Regularized Fisher and Dilatonic Spacetimes Implied by High-Frequency Quasiperiodic Oscillations Observed in Microquasars and Active Galactic Nuclei |
| title_sort | restrictions on regularized fisher and dilatonic spacetimes implied by high frequency quasiperiodic oscillations observed in microquasars and active galactic nuclei |
| topic | Fisher and Dilatonic regularized spacetime quasiperiodic oscilation microquasars supermassive black holes |
| url | https://www.mdpi.com/2218-1997/11/3/99 |
| work_keys_str_mv | AT jaroslavvrba restrictionsonregularizedfisheranddilatonicspacetimesimpliedbyhighfrequencyquasiperiodicoscillationsobservedinmicroquasarsandactivegalacticnuclei AT zdenekstuchlik restrictionsonregularizedfisheranddilatonicspacetimesimpliedbyhighfrequencyquasiperiodicoscillationsobservedinmicroquasarsandactivegalacticnuclei |