Particle motion around generic black holes coupled to non-linear electrodynamics
Abstract We study spherically symmetric magnetically charged generic black hole solutions of general relativity coupled to non-linear electrodynamics (NED). For characteristic values of the generic spacetime parameters we give the position of horizons in dependence on the charge parameter, demonstra...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-09-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-019-7286-2 |
| _version_ | 1818161199316992000 |
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| author | Jaroslav Vrba Ahmadjon Abdujabbarov Arman Tursunov Bobomurat Ahmedov Zdeněk Stuchlík |
| author_facet | Jaroslav Vrba Ahmadjon Abdujabbarov Arman Tursunov Bobomurat Ahmedov Zdeněk Stuchlík |
| author_sort | Jaroslav Vrba |
| collection | DOAJ |
| description | Abstract We study spherically symmetric magnetically charged generic black hole solutions of general relativity coupled to non-linear electrodynamics (NED). For characteristic values of the generic spacetime parameters we give the position of horizons in dependence on the charge parameter, demonstrating separation of the black hole and no-horizon solutions, and possibility of existence of solutions containing three horizons. We show that null, weak and strong energy conditions are violated when the outer horizon is approaching the center. We study effective potentials for photons and massive test particles and location of circular photon orbits (CPO) and innermost stable circular orbit (ISCO). We show that the unstable photon orbit can become stable, leading to the possibility of photon capture which affects on silhouette of the central object. The position of ISCO approaches the horizon with increasing charge parameter q and the energy at ISCO decreases with increasing charge parameter. We investigate this phenomenon and summarize for a variety of the generic spacetime parameters the upper estimate on the spin parameter of the Kerr black which can be mimicked by the generic charged black hole solutions. |
| first_indexed | 2024-12-11T16:13:58Z |
| format | Article |
| id | doaj.art-e8db1ed654a642e99a581fe4a13d0617 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-11T16:13:58Z |
| publishDate | 2019-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-e8db1ed654a642e99a581fe4a13d06172022-12-22T00:59:00ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522019-09-0179911510.1140/epjc/s10052-019-7286-2Particle motion around generic black holes coupled to non-linear electrodynamicsJaroslav Vrba0Ahmadjon Abdujabbarov1Arman Tursunov2Bobomurat Ahmedov3Zdeněk Stuchlík4Institute of Physics and Research Centre of Theoretical Physics and Astrophysics, Faculty of Philosophy and Science, Silesian University in OpavaAmity University in TashkentInstitute of Physics and Research Centre of Theoretical Physics and Astrophysics, Faculty of Philosophy and Science, Silesian University in OpavaUlugh Beg Astronomical InstituteInstitute of Physics and Research Centre of Theoretical Physics and Astrophysics, Faculty of Philosophy and Science, Silesian University in OpavaAbstract We study spherically symmetric magnetically charged generic black hole solutions of general relativity coupled to non-linear electrodynamics (NED). For characteristic values of the generic spacetime parameters we give the position of horizons in dependence on the charge parameter, demonstrating separation of the black hole and no-horizon solutions, and possibility of existence of solutions containing three horizons. We show that null, weak and strong energy conditions are violated when the outer horizon is approaching the center. We study effective potentials for photons and massive test particles and location of circular photon orbits (CPO) and innermost stable circular orbit (ISCO). We show that the unstable photon orbit can become stable, leading to the possibility of photon capture which affects on silhouette of the central object. The position of ISCO approaches the horizon with increasing charge parameter q and the energy at ISCO decreases with increasing charge parameter. We investigate this phenomenon and summarize for a variety of the generic spacetime parameters the upper estimate on the spin parameter of the Kerr black which can be mimicked by the generic charged black hole solutions.http://link.springer.com/article/10.1140/epjc/s10052-019-7286-2 |
| spellingShingle | Jaroslav Vrba Ahmadjon Abdujabbarov Arman Tursunov Bobomurat Ahmedov Zdeněk Stuchlík Particle motion around generic black holes coupled to non-linear electrodynamics European Physical Journal C: Particles and Fields |
| title | Particle motion around generic black holes coupled to non-linear electrodynamics |
| title_full | Particle motion around generic black holes coupled to non-linear electrodynamics |
| title_fullStr | Particle motion around generic black holes coupled to non-linear electrodynamics |
| title_full_unstemmed | Particle motion around generic black holes coupled to non-linear electrodynamics |
| title_short | Particle motion around generic black holes coupled to non-linear electrodynamics |
| title_sort | particle motion around generic black holes coupled to non linear electrodynamics |
| url | http://link.springer.com/article/10.1140/epjc/s10052-019-7286-2 |
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