Chaotic dynamics of pulsating spheres orbiting black holes
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866914960533094400 |
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| author | Rodrigues, Fernanda de F. Mosna, Ricardo A. Vieira, Ronaldo S. S. |
| author_facet | Rodrigues, Fernanda de F. Mosna, Ricardo A. Vieira, Ronaldo S. S. |
| contents | We study the chaotic dynamics of spinless extended bodies in a wide class of spherically symmetric spacetimes, which encompasses black-hole scenarios in many modified theories of gravity. We show that a spherically symmetric pulsating ball may have chaotic motion in this class of spacetimes. The cases of the Reissner-Nordstr{ö}m and Ay{ó}n-Beato-Garc{í}a black holes are analyzed in detail. The equations of motion for the extended bodies are obtained according to Dixon's formalism, up to quadrupole order. Then, we use Melnikov's method to show the presence of homoclinic intersections, which imply chaotic behavior, as a consequence of our assumption that the test body has an oscillating radius. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_14667 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Chaotic dynamics of pulsating spheres orbiting black holes Rodrigues, Fernanda de F. Mosna, Ricardo A. Vieira, Ronaldo S. S. General Relativity and Quantum Cosmology Chaotic Dynamics We study the chaotic dynamics of spinless extended bodies in a wide class of spherically symmetric spacetimes, which encompasses black-hole scenarios in many modified theories of gravity. We show that a spherically symmetric pulsating ball may have chaotic motion in this class of spacetimes. The cases of the Reissner-Nordstr{ö}m and Ay{ó}n-Beato-Garc{í}a black holes are analyzed in detail. The equations of motion for the extended bodies are obtained according to Dixon's formalism, up to quadrupole order. Then, we use Melnikov's method to show the presence of homoclinic intersections, which imply chaotic behavior, as a consequence of our assumption that the test body has an oscillating radius. |
| title | Chaotic dynamics of pulsating spheres orbiting black holes |
| topic | General Relativity and Quantum Cosmology Chaotic Dynamics |
| url | https://arxiv.org/abs/2409.14667 |