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Gravitational waves from binary black holes in a self-interacting scalar dark matter cloud
- Publication Year :
- 2023
- Publisher :
- HAL CCSD, 2023.
-
Abstract
- 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 $-4$PN and $-5.5$PN orders, relative to the prediction of vacuum general relativity, due to accretion and dynamical friction, respectively. 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~$\lambda_4$; observations by ET and Advanced~LIGO could also detect these effects, albeit in a more limited region of parameter space. Crucially, we find that even if a dark matter cloud has a bulk density~$\rho_0$ that is too dilute to be detected via the effects of dynamical friction, the imprints of accretion could still be observable because it is controlled by the independent scale $\rho_a = 4 m_{\rm DM}^4 c^3/(3 \lambda_4 \hbar^3)$. In the models we consider, the infalling dark matter increases in density up to this characteristic scale $\rho_a$ near the Schwarzschild radius, which sets the accretion rate and its associated impact on the gravitational~waveform.<br />Comment: 20 pages, 6 figures, 5 tables
- Subjects :
- High Energy Physics - Theory
Astrophysics and Astronomy
wave function
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
gr-qc
astro-ph.GA
FOS: Physical sciences
General Relativity and Quantum Cosmology (gr-qc)
mass: scalar
General Relativity and Quantum Cosmology
accretion
DECIGO
general relativity
cloud
self-force: scalar
dark matter: scalar
LIGO
correction: higher-order
density
LISA
General Relativity and Cosmology
[PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th]
hep-th
gravitational radiation
Schwarzschild
Astrophysics - Astrophysics of Galaxies
field theory: scalar
High Energy Physics - Theory (hep-th)
black hole: binary
gravitation
Astrophysics of Galaxies (astro-ph.GA)
astro-ph.CO
[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc]
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Particle Physics - Theory
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....f1e9ba476643beddc45e555c424b22fa