Gravitational waves from binary black holes in a self-interacting scalar dark matter cloud

Autor:	Boudon, Alexis, Brax, Philippe, Valageas, Patrick, Wong, Leong Khim
Rok vydání:	2023
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics Astrophysics - Astrophysics of Galaxies General Relativity and Quantum Cosmology High Energy Physics - Theory
Druh dokumentu:	Working Paper
Popis:	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~$\lambda_4$. This would correspond to scenarios with dark matter clouds smaller than $0.1$ pc, which would be difficult to detect by other probes. Comment: 20 pages, 6 figures, 5 tables
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2305.18540 Zobrazit plný text záznamu View this record from Arxiv