Coincident morphological transitions in precessing black-hole binaries
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866909755387150336 |
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| author | Gerosa, Davide Foroni, Giulia Fumagalli, Giulia Berti, Emanuele |
| author_facet | Gerosa, Davide Foroni, Giulia Fumagalli, Giulia Berti, Emanuele |
| contents | We present new insights into the phenomenology of post-Newtonian spin precession in black-hole binaries. Using multi-timescale methods, previous work has shown that the precession and nutation dynamics in such systems can be classified into so-called spin morphologies --mutually exclusive regions that partition the configuration space and characterize the motion of the black-hole spins relative to the binary's angular momentum. Radiation reaction can induce secular transitions between different morphology classes, which are generic occurrences during the inspiral of black-hole binaries. In this contribution, we systematically explore a more restrictive class of solutions in which multiple morphological transitions occur concurrently, i.e., within the same precession cycle. We find that all such cases can be mapped and characterized analytically, and we confirm these findings through numerical integrations. These coincident transitions correspond to extreme spin configurations in black-hole binaries with potential observational signatures in gravitational-wave astronomy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_19735 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Coincident morphological transitions in precessing black-hole binaries Gerosa, Davide Foroni, Giulia Fumagalli, Giulia Berti, Emanuele General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena We present new insights into the phenomenology of post-Newtonian spin precession in black-hole binaries. Using multi-timescale methods, previous work has shown that the precession and nutation dynamics in such systems can be classified into so-called spin morphologies --mutually exclusive regions that partition the configuration space and characterize the motion of the black-hole spins relative to the binary's angular momentum. Radiation reaction can induce secular transitions between different morphology classes, which are generic occurrences during the inspiral of black-hole binaries. In this contribution, we systematically explore a more restrictive class of solutions in which multiple morphological transitions occur concurrently, i.e., within the same precession cycle. We find that all such cases can be mapped and characterized analytically, and we confirm these findings through numerical integrations. These coincident transitions correspond to extreme spin configurations in black-hole binaries with potential observational signatures in gravitational-wave astronomy. |
| title | Coincident morphological transitions in precessing black-hole binaries |
| topic | General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2508.19735 |