Gravitational waves from binary black holes in a self-interacting scalar dark matter cloud
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| Main Authors: | , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866913965241532416 |
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| author | Boudon, Alexis Brax, Philippe Valageas, Patrick Wong, Leong Khim |
| author_facet | Boudon, Alexis Brax, Philippe Valageas, Patrick Wong, Leong Khim |
| contents | We investigate the imprints of accretion and dynamical friction on the gravitational-wave signals emitted by binary black holes embedded in a scalar dark matter cloud. As a key feature in this work, we focus on scalar fields with a repulsive self-interaction that balances against the self-gravity of the cloud. To a first approximation, the phase of the gravitational-wave signal receives extra correction terms at $-3$PN, $-4$PN and $-5.5$PN orders, relative to the prediction of vacuum general relativity, due to cloud gravity, accretion and dynamical friction. Future observations by LISA and B-DECIGO have the potential to detect these effects for a large range of scalar masses~$m_\mathrm{DM}$ and self-interaction couplings~$λ_4$. This would correspond to scenarios with dark matter clouds smaller than $0.1$ pc, which would be difficult to detect by other probes. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2305_18540 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Gravitational waves from binary black holes in a self-interacting scalar dark matter cloud Boudon, Alexis Brax, Philippe Valageas, Patrick Wong, Leong Khim Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies General Relativity and Quantum Cosmology High Energy Physics - Theory We investigate the imprints of accretion and dynamical friction on the gravitational-wave signals emitted by binary black holes embedded in a scalar dark matter cloud. As a key feature in this work, we focus on scalar fields with a repulsive self-interaction that balances against the self-gravity of the cloud. To a first approximation, the phase of the gravitational-wave signal receives extra correction terms at $-3$PN, $-4$PN and $-5.5$PN orders, relative to the prediction of vacuum general relativity, due to cloud gravity, accretion and dynamical friction. Future observations by LISA and B-DECIGO have the potential to detect these effects for a large range of scalar masses~$m_\mathrm{DM}$ and self-interaction couplings~$λ_4$. This would correspond to scenarios with dark matter clouds smaller than $0.1$ pc, which would be difficult to detect by other probes. |
| title | Gravitational waves from binary black holes in a self-interacting scalar dark matter cloud |
| topic | Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2305.18540 |