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标题: "Periodic orbits and gravitational wave signatures from magnetic dipoles around magnetized Kerr black holes"
原文链接: "https://arxiv.org/abs/2608.11048"
发布日期: "2026-08-11"
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---

## General Relativity and Quantum Cosmology

## Title:Periodic orbits and gravitational wave signatures from magnetic dipoles around magnetized Kerr black holes

[View PDF](https://arxiv.org/pdf/2608.11048) [HTML (experimental)](https://arxiv.org/html/2608.11048v1)

> Abstract:We study periodic orbits and the associated gravitational radiation of a magnetized (uncharged) test particle carrying a magnetic dipole moment with coupling constant beta, moving in the equatorial plane of a rotating, magnetized Kerr black hole immersed in an external asymptotically uniform magnetic field, starting from the effective potential derived for such particles. We compute the marginally bound orbit (MBO) and the innermost stable circular orbit (ISCO) as functions of the black hole spin a and the magnetic coupling beta, and map out the allowed region of the orbital energy-angular momentum (L, E) plane for bound motion. We then classify periodic orbits using the topological zoom-whirl scheme of Levin and Perez-Giz, characterized by three integers (z,w,v) through the rational rotation number q=w+v/z, and construct a family of closed rosette orbits at fixed angular momentum. Using the numerical-kludge, restricted-quadrupole approximation for an extreme-mass-ratio inspiral consisting of a stellar-mass magnetized secondary orbiting a supermassive magnetized Kerr black hole, we compute the time-domain gravitational waveforms h\_+(t), h\_\\times(t) produced by these periodic orbits and their frequency-domain characteristic strain, and compare the latter with the anticipated instrumental sensitivity curves of LISA, Taiji and TianQin. We find that the magnetic coupling \\beta systematically shifts the MBO and ISCO outward and lowers their orbital energy and angular momentum, that the zoom-whirl structure of the periodic orbits is imprinted directly on the burst-like morphology of the emitted waveform, and that the resulting gravitational-wave signals fall within the sensitivity band of upcoming space-based detectors for suitably close and massive sources.

| Comments: |  |
| --- | --- |
| Subjects: | General Relativity and Quantum Cosmology (gr-qc) |
| Cite as: | [arXiv:2608.11048](https://arxiv.org/abs/2608.11048) \[gr-qc\] |
|  | (or [arXiv:2608.11048v1](https://arxiv.org/abs/2608.11048v1) \[gr-qc\] for this version) |
|  | [https://doi.org/10.48550/arXiv.2608.11048](https://doi.org/10.48550/arXiv.2608.11048) |

## Submission history

From: Shokhzod Jumaniyozov \[[view email](https://arxiv.org/show-email/b3d9ec11/2608.11048)\]  
**\[v1\]** Tue, 11 Aug 2026 15:20:57 UTC (548 KB)

[Which authors of this paper are endorsers?](https://arxiv.org/auth/show-endorsers/2608.11048) | Disable MathJax ([What is MathJax?](https://info.arxiv.org/help/mathjax.html))
