Epicyclic oscillations, particle collisions, emission energy and thermal fluctuation around a black hole with de-sitter core
This study tested the geometric structure and dynamic behavior of particles around a non-rotating black hole (BH) featuring a de Sitter core. We derive the space-time metric and analyze key features such as the lapse function, effective potential, innermost stable circular orbits (ISCOs), and partic...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-08-01
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| Series: | Nuclear Physics B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S055032132500135X |
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| author | Amna Saleem Allah Ditta Abdelmalek Bouzenada Badr S. Alkahtani |
| author_facet | Amna Saleem Allah Ditta Abdelmalek Bouzenada Badr S. Alkahtani |
| author_sort | Amna Saleem |
| collection | DOAJ |
| description | This study tested the geometric structure and dynamic behavior of particles around a non-rotating black hole (BH) featuring a de Sitter core. We derive the space-time metric and analyze key features such as the lapse function, effective potential, innermost stable circular orbits (ISCOs), and particle trajectories. The Hamiltonian framework reveals that the de Sitter core radius R significantly influences particle dynamics: a larger R shifts the effective potential minima closer to the horizon, enhances the attractive effective force and marginally impacts the ISCO radii. Numerical solutions of motion demonstrate modified trajectories compared to Schwarzschild BHs, with a higher center of mass energy (CME) near the horizon for larger R. Harmonic oscillation frequencies, periastron precession, and thermodynamic properties, including temperature, specific heat, and Hawking radiation emission, are quantified. Thermodynamic stability is tested for specific parameter ranges, with the temperature decreasing as R increases. Our results explain the relation between the de Sitter core and gravitational dynamics, providing insight into the stability and energy properties. |
| format | Article |
| id | doaj-art-bd35117be57f4f18b43297fc0fcf0b7a |
| institution | DOAJ |
| issn | 0550-3213 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Physics B |
| spelling | doaj-art-bd35117be57f4f18b43297fc0fcf0b7a2025-08-20T02:55:13ZengElsevierNuclear Physics B0550-32132025-08-01101711692610.1016/j.nuclphysb.2025.116926Epicyclic oscillations, particle collisions, emission energy and thermal fluctuation around a black hole with de-sitter coreAmna Saleem0Allah Ditta1Abdelmalek Bouzenada2Badr S. Alkahtani3Department of Mathematics, Riphah International University, Faisalabad Campus, 38000, Punjab, PakistanDepartment of Mathematics, Shanghai University and Newtouch Center for Mathematics of Shanghai University, Shanghai, 200444, PR China; Research Center of Astrophysics and Cosmology, Khazar University, Baku, AZ1096, 41 Mehseti Street, AzerbaijanLaboratory of Theoretical and Applied Physics, Echahid Cheikh Larbi Tebessi University, 12001, AlgeriaDepartment of Mathematics, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; Corresponding author.This study tested the geometric structure and dynamic behavior of particles around a non-rotating black hole (BH) featuring a de Sitter core. We derive the space-time metric and analyze key features such as the lapse function, effective potential, innermost stable circular orbits (ISCOs), and particle trajectories. The Hamiltonian framework reveals that the de Sitter core radius R significantly influences particle dynamics: a larger R shifts the effective potential minima closer to the horizon, enhances the attractive effective force and marginally impacts the ISCO radii. Numerical solutions of motion demonstrate modified trajectories compared to Schwarzschild BHs, with a higher center of mass energy (CME) near the horizon for larger R. Harmonic oscillation frequencies, periastron precession, and thermodynamic properties, including temperature, specific heat, and Hawking radiation emission, are quantified. Thermodynamic stability is tested for specific parameter ranges, with the temperature decreasing as R increases. Our results explain the relation between the de Sitter core and gravitational dynamics, providing insight into the stability and energy properties.http://www.sciencedirect.com/science/article/pii/S055032132500135XBlack hole dynamicsDe-Sitter coreParticle motionEffective potentialEpicyclic oscillationsPeriastron precession |
| spellingShingle | Amna Saleem Allah Ditta Abdelmalek Bouzenada Badr S. Alkahtani Epicyclic oscillations, particle collisions, emission energy and thermal fluctuation around a black hole with de-sitter core Nuclear Physics B Black hole dynamics De-Sitter core Particle motion Effective potential Epicyclic oscillations Periastron precession |
| title | Epicyclic oscillations, particle collisions, emission energy and thermal fluctuation around a black hole with de-sitter core |
| title_full | Epicyclic oscillations, particle collisions, emission energy and thermal fluctuation around a black hole with de-sitter core |
| title_fullStr | Epicyclic oscillations, particle collisions, emission energy and thermal fluctuation around a black hole with de-sitter core |
| title_full_unstemmed | Epicyclic oscillations, particle collisions, emission energy and thermal fluctuation around a black hole with de-sitter core |
| title_short | Epicyclic oscillations, particle collisions, emission energy and thermal fluctuation around a black hole with de-sitter core |
| title_sort | epicyclic oscillations particle collisions emission energy and thermal fluctuation around a black hole with de sitter core |
| topic | Black hole dynamics De-Sitter core Particle motion Effective potential Epicyclic oscillations Periastron precession |
| url | http://www.sciencedirect.com/science/article/pii/S055032132500135X |
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