Sharpening the dark matter signature in gravitational waveforms I: Accretion and eccentricity evolution
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866918157251248128 |
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| author | Karydas, Theophanes K. Kavanagh, Bradley J. Bertone, Gianfranco |
| author_facet | Karydas, Theophanes K. Kavanagh, Bradley J. Bertone, Gianfranco |
| contents | Dark matter overdensities around black holes can alter the dynamical evolution of a companion object orbiting around it, and cause a dephasing of the gravitational waveform. Here, we present a refined calculation of the co-evolution of the binary and the dark matter distribution, taking into account the accretion of dark matter particles on the companion black hole, and generalizing previous quasi-circular calculations to the general case of eccentric orbits. These calculations are validated by dedicated N-body simulations. We show that accretion can lead to a large dephasing, and therefore cannot be neglected in general. We also demonstrate that dark matter spikes tend to circularize eccentric orbits faster than previously thought. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_13053 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Sharpening the dark matter signature in gravitational waveforms I: Accretion and eccentricity evolution Karydas, Theophanes K. Kavanagh, Bradley J. Bertone, Gianfranco General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology Dark matter overdensities around black holes can alter the dynamical evolution of a companion object orbiting around it, and cause a dephasing of the gravitational waveform. Here, we present a refined calculation of the co-evolution of the binary and the dark matter distribution, taking into account the accretion of dark matter particles on the companion black hole, and generalizing previous quasi-circular calculations to the general case of eccentric orbits. These calculations are validated by dedicated N-body simulations. We show that accretion can lead to a large dephasing, and therefore cannot be neglected in general. We also demonstrate that dark matter spikes tend to circularize eccentric orbits faster than previously thought. |
| title | Sharpening the dark matter signature in gravitational waveforms I: Accretion and eccentricity evolution |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2402.13053 |