Chaotic motion of charged test particles in a Kerr-MOG black hole with explicit symplectic algorithms
Abstract The Kerr-MOG black hole has recently attracted significant research attention and has been extensively applied in various fields. To accurately characterize the long-term dynamical evolution of charged particles around a Kerr-MOG black hole, it is essential to utilize numerical algorithms t...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-07-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14425-1 |
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| author | Zhenmeng Xu Dazhu Ma Wenfu Cao Kai Li |
| author_facet | Zhenmeng Xu Dazhu Ma Wenfu Cao Kai Li |
| author_sort | Zhenmeng Xu |
| collection | DOAJ |
| description | Abstract The Kerr-MOG black hole has recently attracted significant research attention and has been extensively applied in various fields. To accurately characterize the long-term dynamical evolution of charged particles around a Kerr-MOG black hole, it is essential to utilize numerical algorithms that are high-precision, stable, and capable of preserving the inherent physical structural properties. In this study, we employ explicit symplectic algorithms combined with the Hamiltonian splitting technique to numerically solve the equations of motion for charged particles. Initially, by decomposing the Hamiltonian into five integrable components, three distinct explicit symplectic algorithms (S2, S4, and $$PR{K_6}4)$$ P R K 6 4 ) are constructed. Numerical experiments reveal that the $$PR{K_6}4$$ P R K 6 4 algorithm achieves superior accuracy. Subsequently, we utilize Poincaré sections and the fast Lyapunov indicator (FLI) to investigate the dynamic evolution of the particle. Our numerical results demonstrate that the energy E, angular momentum L, magnetic field parameter $$\beta ,$$ β , black hole spin parameter a, and MOG parameter $$\alpha $$ α all significantly influence the particle’s motion. Specifically, the chaotic region expands with an increase in E, $$\beta ,$$ β , or $$\alpha ,$$ α , but contracts with an increase in a or L. Furthermore, when any two of these five parameters are varied simultaneously, it becomes evident that a and L predominantly dictate the system’s behavior. This study not only offers novel insights into the chaotic dynamics associated with Kerr-MOG black holes but also extends the application of symplectic algorithms in strong gravitational fields. |
| format | Article |
| id | doaj-art-21332b2a4f8a4728a0e8257e938e61df |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-21332b2a4f8a4728a0e8257e938e61df2025-08-20T03:46:29ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-07-0185712010.1140/epjc/s10052-025-14425-1Chaotic motion of charged test particles in a Kerr-MOG black hole with explicit symplectic algorithmsZhenmeng Xu0Dazhu Ma1Wenfu Cao2Kai Li3School of Mathematics and Statistics, Hubei Minzu UniversityCollege of Intelligent Systems Science and Engineering, Hubei Minzu UniversitySchool of Physics and Technology, University of JinanSchool of Mathematics and Statistics, Hubei Minzu UniversityAbstract The Kerr-MOG black hole has recently attracted significant research attention and has been extensively applied in various fields. To accurately characterize the long-term dynamical evolution of charged particles around a Kerr-MOG black hole, it is essential to utilize numerical algorithms that are high-precision, stable, and capable of preserving the inherent physical structural properties. In this study, we employ explicit symplectic algorithms combined with the Hamiltonian splitting technique to numerically solve the equations of motion for charged particles. Initially, by decomposing the Hamiltonian into five integrable components, three distinct explicit symplectic algorithms (S2, S4, and $$PR{K_6}4)$$ P R K 6 4 ) are constructed. Numerical experiments reveal that the $$PR{K_6}4$$ P R K 6 4 algorithm achieves superior accuracy. Subsequently, we utilize Poincaré sections and the fast Lyapunov indicator (FLI) to investigate the dynamic evolution of the particle. Our numerical results demonstrate that the energy E, angular momentum L, magnetic field parameter $$\beta ,$$ β , black hole spin parameter a, and MOG parameter $$\alpha $$ α all significantly influence the particle’s motion. Specifically, the chaotic region expands with an increase in E, $$\beta ,$$ β , or $$\alpha ,$$ α , but contracts with an increase in a or L. Furthermore, when any two of these five parameters are varied simultaneously, it becomes evident that a and L predominantly dictate the system’s behavior. This study not only offers novel insights into the chaotic dynamics associated with Kerr-MOG black holes but also extends the application of symplectic algorithms in strong gravitational fields.https://doi.org/10.1140/epjc/s10052-025-14425-1 |
| spellingShingle | Zhenmeng Xu Dazhu Ma Wenfu Cao Kai Li Chaotic motion of charged test particles in a Kerr-MOG black hole with explicit symplectic algorithms European Physical Journal C: Particles and Fields |
| title | Chaotic motion of charged test particles in a Kerr-MOG black hole with explicit symplectic algorithms |
| title_full | Chaotic motion of charged test particles in a Kerr-MOG black hole with explicit symplectic algorithms |
| title_fullStr | Chaotic motion of charged test particles in a Kerr-MOG black hole with explicit symplectic algorithms |
| title_full_unstemmed | Chaotic motion of charged test particles in a Kerr-MOG black hole with explicit symplectic algorithms |
| title_short | Chaotic motion of charged test particles in a Kerr-MOG black hole with explicit symplectic algorithms |
| title_sort | chaotic motion of charged test particles in a kerr mog black hole with explicit symplectic algorithms |
| url | https://doi.org/10.1140/epjc/s10052-025-14425-1 |
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