تقرير
Sharpening the dark matter signature in gravitational waveforms I: Accretion and eccentricity evolution
| العنوان: | Sharpening the dark matter signature in gravitational waveforms I: Accretion and eccentricity evolution |
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| المؤلفون: | Karydas, Theophanes K., Kavanagh, Bradley J., Bertone, Gianfranco |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology |
| الوصف: | 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. Comment: 19 pages, 14 figures + appendices. Companion paper to "Sharpening the dark matter signature in gravitational waveforms II: Numerical simulations with the NbodyIMRI code" (arXiv:2402.13762). v2: Added references |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2402.13053 |
| رقم الأكسشن: | edsarx.2402.13053 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |