Primordial Black Hole Interpretation in Subsolar Mass Gravitational Wave Candidate SSM200308

2024/04/04 by Chen Yuan, Yuan, Chen, Qingguo Huang +1 · 3 citations
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Gamma-ray bursts and supernovae #General Relativity and Quantum Cosmology (gr-qc) #Geophysics and Gravity Measurements #High Energy Physics - Phenomenology (hep-ph) #Pulsars and Gravitational Waves Research

paper · pdf · doi:10.48550/arxiv.2404.03328

openalex publication_date 2024/04/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

In the recent second part of the third observation run by the LIGO-Virgo-KAGRA collaboration, a candidate with sub-solar mass components was reported, which we labelled as SSM200308. This study investigates the premise that primordial black holes (PBHs), arising from Gaussian perturbation collapses, could explain SSM200308. Through Bayesian analysis, we obtain the primordial curvature power spectrum that leads to the merger rate of PBHs aligning with observational data as long as they constitute f_PBH=5.66^+58.68_-5.44× 10^-2 of the dark matter. However, while the gravitational wave (GW) background from binary PBH mergers is within current observational limits, the scalar-induced GWs associated with PBH formation exceed the constraints imposed by pulsar timing arrays, challenging the Gaussian perturbation collapse PBH model as the source of SSM200308.

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• Sub-Solar Mass Intermediate Mass Ratio Inspirals: Waveform Systematics and Detection Prospects with Gravitational Waves
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• GW231123 Mass Gap Event and the Primordial Black Hole Scenario

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