Dancing in the dark: detecting a population of distant primordial black holes

Abstract

Primordial black holes (PBHs) are compact objects proposed to have formed in the early Universe from the collapse of small-scale over-densities. Their existence may be detected from the observation of gravitational waves (GWs) emitted by PBH mergers, if the signals can be distinguished from those produced by the merging of astrophysical black holes. In this work, we forecast the capability of the Einstein Telescope, a proposed third-generation GW observatory, to identify and measure the abundance of a subdominant population of distant PBHs, using the difference in the redshift evolution of the merger rate of the two populations as our discriminant. We carefully model the merger rates and generate realistic mock catalogues of the luminosity distances and errors that would be obtained from GW signals observed by the Einstein Telescope. We use two independent statistical methods to analyse the mock data, finding that, with our more powerful, likelihood-based method, PBH abundances as small as $f_{\mathrm{PBH}}\approx 7\times 10^{-6}$ ($f_{\mathrm{PBH}}\approx 2\times 10^{-6}$) would be distinguishable from $f_{\mathrm{PBH}}=0$ at the level of $3\sigma$ with a one year (ten year) observing run of the Einstein Telescope. Our mock data generation code, darksirens, is fast, easily extendable and publicly available on GitLab.

45 pages, 15 figures. This version aligns with the one accepted by JCAP. Mock generation code available at https://gitlab.com/matmartinelli/darksirens

References in corpus (33)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Cosmic Star Formation History
• Laser Interferometer Space Antenna
• GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
• Properties and astrophysical implications of the 150 Msun binary black hole merger GW190521
• The merger rate of primordial-black-hole binaries
• Effect of Primordial Black Holes on the Cosmic Microwave Background and Cosmological Parameter Estimates
• Primordial black hole dark matter from single field inflation
• Concepts and status of Chinese space gravitational wave detection projects
• The origins of massive black holes
• Determination of Dark Energy by the Einstein Telescope: Comparing with CMB, BAO and SNIa Observations
• Understanding caustic crossings in giant arcs: characteristic scales, event rates, and constraints on compact dark matter
• Primordial Black Holes Confront LIGO/Virgo data: Current situation
• Estimating cosmological parameters by the simulated data of gravitational waves from the Einstein Telescope
• Searching for a subpopulation of primordial black holes in LIGO/Virgo gravitational-wave data
• The properties of merging black holes and neutron stars across cosmic time
• The Impact of Star Formation and Gamma-Ray Burst Rates at High Redshift on Cosmic Chemical Evolution and Reionization
• Bayesian Evidence for Both Astrophysical and Primordial Black Holes: Mapping the GWTC-2 Catalog to Third-Generation Detectors
• Primordial Black Hole Dark Matter and the LIGO/Virgo observations
• Can we distinguish astrophysical from primordial black holes via the stochastic gravitational wave background?
• Formation channels of single and binary stellar-mass black holes
• Prospects for probing gravitational waves from primordial black hole binaries
• The Minimum Testable Abundance of Primordial Black Holes at Future Gravitational-Wave Detectors
• How to assess the primordial origin of single gravitational-wave events with mass, spin, eccentricity, and deformability measurements
• Maximum redshift of gravitational wave merger events
• On the single-event-based identification of primordial black hole mergers at cosmological distances
• Prospects of discovering sub-solar primordial black holes using the stochastic gravitational wave background from third-generation detectors
• Primordial black hole mergers from three-body interactions
• Learning how to surf: Reconstructing the propagation and origin of gravitational waves with Gaussian Processes
• Tracking the origin of black holes with the stochastic gravitational wave background popcorn signal
• Cosmic archaeology with massive stellar black hole binaries
• Constraining changes in the merger history of (P)BH binaries with the stochastic gravitational wave background
• From planes to spheres: About gravitational lens magnifications

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• Science with the Einstein Telescope: a comparison of different designs
• Primordial non-gaussianity up to all orders: theoretical aspects and implications for primordial black hole models
• From inflation to black hole mergers and back again: Gravitational-wave data-driven constraints on inflationary scenarios with a first-principle model of primordial black holes across the QCD epoch
• The Science of the Einstein Telescope
• Primordial Black Holes
• Primordial black holes in the curvaton model: possible connections to pulsar timing arrays and dark matter
• Primordial black hole dark matter from inflation: the reverse engineering approach
• Searching for Primordial Black Holes with the Einstein Telescope: impact of design and systematics
• Primordial black hole mergers from three-body interactions
• Mock data study for next-generation ground-based detectors: The performance loss of matched filtering due to correlated confusion noise
• Future prospects on testing extensions to $\Lambda$CDM through the weak lensing of gravitational waves
• Multimessenger study of merging massive black holes in the OBELISK simulation: gravitational waves, electromagnetic counterparts, and their link to galaxy and black hole populations
• Slaying Axion-Like Particles via Gravitational Waves and Primordial Black Holes from Supercooled Phase Transition
• Redshift evolution of primordial black hole merger rate
• Primordial Black Holes and Scalar-induced Gravitational Waves in Radiative Hybrid Inflation
• Testing gravity with gravitational wave friction and gravitational slip
• Gravitational-wave event rates as a new probe for dark matter microphysics
• Toward More Realistic Mass Functions For Ultradense Dark Matter Halos
• Impact of weak lensing on bright standard siren analyses
• Simulating Binary Primordial Black Hole Mergers in Dark Matter Halos
• Primordial Black Holes and Second-order Gravitational Waves in Axion-like Hybrid Inflation
• Forecast cosmological constraints from the number counts of Gravitational Waves events
• Hierarchical Merger of Primordial Black Holes in Dwarf Galaxies