Possibility of Multi-Messenger Observations of Quasi-Periodic Eruptions with X-rays and Gravitational Waves
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866913839967109120 |
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| author | Suzuguchi, Tomoya Omiya, Hidetoshi Takeda, Hiroki |
| author_facet | Suzuguchi, Tomoya Omiya, Hidetoshi Takeda, Hiroki |
| contents | Recent X-ray observations have discovered a class of periodic X-ray flares in galactic nuclei known as quasi-periodic eruptions (QPEs). A promising explanation of QPEs is an emission produced when a stellar-mass object orbiting a central supermassive black hole crosses an accretion disk. If the companion is a compact object, such systems would be a prospective multi-messenger target for the space-based observatory LISA and its successors. Here we quantify the prospects for joint X-ray and GW detection of QPEs with orbital frequency in the mHz band using a minimal flare-emission model. Our analysis shows that X-ray observations are most effective at orbital frequencies up to roughly 1 mHz, whereas LISA is sensitive chiefly above about 1 mHz. Because the optimal sensitivity windows overlap only marginally, we predict at most one joint detection during LISA's nominal mission lifetime. Extending GW sensitivity into the sub-millihertz regime (< 0.1 mHz) would raise the possibility of the joint detection by an order of magnitude, enabling QPEs as an interesting multi-messenger target. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_10488 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Possibility of Multi-Messenger Observations of Quasi-Periodic Eruptions with X-rays and Gravitational Waves Suzuguchi, Tomoya Omiya, Hidetoshi Takeda, Hiroki High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology Recent X-ray observations have discovered a class of periodic X-ray flares in galactic nuclei known as quasi-periodic eruptions (QPEs). A promising explanation of QPEs is an emission produced when a stellar-mass object orbiting a central supermassive black hole crosses an accretion disk. If the companion is a compact object, such systems would be a prospective multi-messenger target for the space-based observatory LISA and its successors. Here we quantify the prospects for joint X-ray and GW detection of QPEs with orbital frequency in the mHz band using a minimal flare-emission model. Our analysis shows that X-ray observations are most effective at orbital frequencies up to roughly 1 mHz, whereas LISA is sensitive chiefly above about 1 mHz. Because the optimal sensitivity windows overlap only marginally, we predict at most one joint detection during LISA's nominal mission lifetime. Extending GW sensitivity into the sub-millihertz regime (< 0.1 mHz) would raise the possibility of the joint detection by an order of magnitude, enabling QPEs as an interesting multi-messenger target. |
| title | Possibility of Multi-Messenger Observations of Quasi-Periodic Eruptions with X-rays and Gravitational Waves |
| topic | High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2505.10488 |