Primordial Gravitational Wave Background as a Probe of the Primordial Black Holes

2025/07/14 by Utkarsh Kumar, Kumar, Utkarsh · 7 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Pulsars and Gravitational Waves Research #Relativity and Gravitational Theory

paper · pdf · doi:10.48550/arxiv.2507.10033

openalex publication_date 2025/07/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the formation of primordial black holes (PBHs) from the collapse of density perturbations induced by primordial gravitational waves (PGWs). The PGWs' interpretation of the stochastic gravitational wave background (SGWB) detected by the Pulsar Timing Array (PTA) corresponds to PBHs formation in the mass range [10^-12-10^-3] M_\odot. Importantly, our analysis shows that PGWs' interpretation of recent PTA data remains viable, as it does not lead to PBH overproduction. We derive the amplitude of PGWs by leveraging existing constraints on the PBH abundance across a wide mass range. Notably, these constrained amplitudes predict SGWB signals that would be detectable by future gravitational wave observatories.

Citations

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Cited by

• Primordial Black Hole from Tensor-induced Density Fluctuation: First-order Phase Transitions and Domain Walls
• Beyond Standard Model equation of state and primordial black holes
• Exploring Ultra-Slow-Roll Inflation in Composite Pseudo-Nambu-Goldstone Boson Models: Implications for Primordial Black Holes and Gravitational Waves
• Implications for Pulsar Timing Arrays of Sub-solar Black Hole Detections: From LVK to Einstein Telescope and Cosmic Explorer
• The Magnetic Origin of Primordial Black Holes: A Viable Dark Matter Scenario
• Disentangling the Origins of the NANOGrav Signal: Early Universe Models and ΔN_eff Bounds
• Simulating a Gaussian stochastic gravitational wave background signal in pulsar timing arrays

Related

• Relic gravitational waves from primordial gravitational collapses
• Detecting the Stochastic Gravitational Wave Background from Primordial Black Holes in Slow-reheating Scenarios
• Probing primordial black hole scenarios with terrestrial gravitational wave detectors
• Probing Primordial Black Hole Mergers in Clusters with Pulsar Timing Data
• Scrutinizing the Primordial Black Holes Interpretation of PTA Gravitational Waves and JWST Early Galaxies