Clustering and Runaway Merging in a Primordial Black Hole Dominated Universe
arXiv:2412.01890 · doi:10.1103/296w-v86n
Abstract
If primordial black holes (PBH) are present in the early universe, their contribution to the energy budget grows relative to that of radiation and generically becomes dominant unless the initial abundance is exponentially small. This black hole domination scenario is largely unconstrained for PBHs with masses , which evaporate prior to Big Bang nucleosynthesis. However, if the era of PBH domination is sufficiently long, the PBHs form clusters and can merge appreciably within these objects. We calculate the population statistics of these clusters within the Press-Schechter formalism and find that, for a wide range of PBH masses and Hubble rates at the onset of PBH domination, the mergers within PBH clusters can exhibit runaway behavior, where the majority of the cluster will eventually form a single black hole with a mass much greater than the original PBH mass. These mergers can dramatically alter the PBH mass distribution and leave behind merged relic black holes that evaporate after Big Bang nucleosynthesis and yield various observational signatures, excluding parameter choices previously thought to be viable
arXiv comment16 pages, 5 figures, 1 appendix. New figure to clarify three-body capture, conclusions unchanged, matches journal version
References in corpus (60)
- Observation of Gravitational Waves from a Binary Black Hole Merger
- Halo Models of Large Scale Structure
- Did LIGO detect dark matter?
- New cosmological constraints on primordial black holes
- Encyclopaedia Inflationaris
- Possibility of Direct Measurement of the Acceleration of the Universe Using 0.1 Hz Band Laser Interferometer Gravitational Wave Antenna in Space
- Primordial Black Hole Scenario for the Gravitational-Wave Event GW150914
- Primordial Black Holes - Perspectives in Gravitational Wave Astronomy -
- Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
- Primordial Black Holes as a dark matter candidate
- The Assembly of the First Massive Black Holes
- Inspiral-merger-ringdown waveforms for black-hole binaries with non-precessing spins
- Measuring gravitational waves from binary black hole coalescences: I. Signal to noise for inspiral, merger, and ringdown
- Gravitational waves from scattering of stellar-mass black holes in galactic nuclei
- Detector configuration of DECIGO/BBO and identification of cosmological neutron-star binaries
- The merger rate of primordial-black-hole binaries
- Gravitational Waves from Coalescing Black Hole MACHO Binaries
- Formation and Evolution of Primordial Black Hole Binaries in the Early Universe
- Gravitational Waves from Primordial Black Hole Mergers
- The Assembly of Supermassive Black Holes at High Redshifts
- The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
- Primordial Black Holes as Dark Matter: The Power Spectrum and Evaporation of Early Structures
- Self-Interacting Dark Matter Halos and the Gravothermal Catastrophe
- Gravitational waves from a universe filled with primordial black holes
- Voyager 1 Further Constrain Primordial Black Holes as Dark Matter
- Dark Radiation and Superheavy Dark Matter from Black Hole Domination
- Gravitational Wave Production right after a Primordial Black Hole Evaporation
- Early Structure Formation in PBH Cosmologies
- Primordial black hole production during first-order phase transitions
- Black Hole Binary Formation in the Expanding Universe --- Three Body Problem Approximation ---
- Melanopogenesis: Dark Matter of (almost) any Mass and Baryonic Matter from the Evaporation of Primordial Black Holes weighing a Ton (or less)
- Primordial black holes from supersymmetry in the early universe
- Enhancement of Gravitational Waves Induced by Scalar Perturbations due to a Sudden Transition from an Early Matter Era to the Radiation Era
- Black Hole Genesis of Dark Matter
- Primordial Black Hole Evaporation and Dark Matter Production: I. Solely Hawking radiation
- Orbital eccentricities in primordial black holes binaries
- The Clustering Evolution of Primordial Black Holes
- Gravitational wave constraints on the primordial black hole dominated early universe
- The Spatial Clustering of Primordial Black Holes
- Exploring Evaporating Primordial Black Holes with Gravitational Waves
- Primordial Black Holes as Dark Matter: Converting Constraints from Monochromatic to Extended Mass Distributions
- CMB and BBN constraints on evaporating primordial black holes revisited
- GUT Baryogenesis With Primordial Black Holes
- Simulations of Axion Minihalos
- Evaporation of Primordial Black Holes in the Early Universe: Mass and Spin Distributions
- Redshift Effects in Particle Production from Kerr Primordial Black Holes
- GUT-Scale Primordial Black Holes: Mergers and Gravitational Waves
- Annihilation Signatures of Hidden Sector Dark Matter Within Early-Forming Microhalos
- Cosmic strings and primordial black holes
- Primordial black hole mergers from three-body interactions
- Clustering of Primordial Black Holes. II. Evolution of Bound Systems
- Heavy primordial black holes from strongly clustered light black holes
- Primordial Black Holes from Axion Domain Wall Collapse
- Structure Formation after Reheating: Supermassive Primordial Black Holes and Fermi Ball Dark Matter
- Stochastic Gravitational Waves from Post-inflationary Structure Formation
- Structure formation with primordial black holes: collisional dynamics, binaries, and gravitational waves
- Small-scale clustering of Primordial Black Holes: cloud-in-cloud and exclusion effects
- Dissipative Dark Cosmology: From Early Matter Dominance to Delayed Compact Objects
- Black Holes from Fermi Ball Collapse
- Warm Hawking Relics From Primordial Black Hole Domination