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Measuring dark matter spikes around primordial black holes with Einstein Telescope and Cosmic Explorer
- Source :
- Physical Review D. 107
- Publication Year :
- 2023
- Publisher :
- American Physical Society (APS), 2023.
-
Abstract
- Future ground-based gravitational wave observatories will be ideal probes of the environments surrounding black holes with masses $1 - 10\,\mathrm{M_\odot}$. Binary black hole mergers with mass ratios of order $q=m_2/m_1\lesssim10^{-3}$ can remain in the frequency band of such detectors for months or years, enabling precision searches for modifications of their gravitational waveforms with respect to vacuum inspirals. As a concrete example of an environmental effect, we consider here a population of binary primordial black holes which are expected to be embedded in dense cold dark matter spikes. We provide a viable formation scenario for these systems compatible with all observational constraints, and predict upper and lower limits on the merger rates of small mass ratio pairs. Given a detected signal of one such system by either Einstein Telescope or Cosmic Explorer, we show that the properties of the binary and of the dark matter spike can be measured to excellent precision with one week's worth of data, if the effect of the dark matter spike on the waveform is taken into account. However, we show that there is a risk of biased parameter inference or missing the events entirely if the effect of the predicted dark matter overdensity around these objects is not properly accounted for.<br />Comment: 14 pages plus appendices, 15 figures
- Subjects :
- High Energy Physics - Phenomenology
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
High Energy Physics - Phenomenology (hep-ph)
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
General Relativity and Quantum Cosmology (gr-qc)
General Relativity and Quantum Cosmology
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- ISSN :
- 24700029 and 24700010
- Volume :
- 107
- Database :
- OpenAIRE
- Journal :
- Physical Review D
- Accession number :
- edsair.doi.dedup.....697de550c44b274b9dd20944a65de5cf