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The GW190521 Mass Gap Event and the Primordial Black Hole Scenario

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arxiv 2009.01728 v2 pith:WWTGAO36 submitted 2020-09-03 astro-ph.CO gr-qchep-ph

V. De Luca , V. Desjacques , G. Franciolini , P. Pani , A. Riotto This is my paper · ORCID
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The LIGO/Virgo Collaboration has recently observed GW190521, the first binary black hole merger with at least the primary component mass in the mass gap predicted by the pair-instability supernova theory. This observation disfavors the standard stellar-origin formation scenario for the heavier black hole, motivating alternative hypotheses. We show that GW190521 cannot be explained within the Primordial Black Hole (PBH) scenario if PBHs do not accrete during their cosmological evolution, since this would require an abundance which is already in tension with current constraints. On the other hand, GW190521 may have a primordial origin if PBHs accrete efficiently before the reionization epoch.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Probability of gravitational-wave lensing by intermediate-mass black holes and globular clusters

    astro-ph.CO 2026-08 conditional novelty 6.0 of 10

    The rate of compound gravitational-wave lensing by intermediate-mass black holes in globular clusters is at most about 10^-3 of galaxy-scale lensed events, disfavoring GW231123 as such an event.

  2. Reconstruction of Primordial Power Spectrum from Gravitational Waves of High-Redshift Black Hole Binaries

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    Gradient-descent inversion of redshifted BBH mass distributions recovers the PBH mass function and, via regularized Press-Schechter, a candidate O(10^{-2}) bump in the small-scale primordial power spectrum.

  3. Probing Primordial Black Hole Mergers in Clusters with Pulsar Timing Data

    astro-ph.CO 2024-12 conditional novelty 6.0 of 10

    Bayesian analysis of IPTA DR2 shows scalar-induced gravitational waves dominate and PBH merger backgrounds are strongly disfavored relative to an astrophysical SMBHB explanation.

  4. Discovering gravitational waveform distortions from lensing: A deep dive into GW231123

    gr-qc 2025-12 conditional novelty 5.0 of 10

    GW231123's apparent gravitational-lensing signal has a false-alarm probability around 4σ, so the event cannot be claimed as lensed under the two-image wave-optics model.

  5. Implications for Pulsar Timing Arrays of Sub-solar Black Hole Detections: From LVK to Einstein Telescope and Cosmic Explorer

    astro-ph.CO 2025-08 conditional novelty 5.0 of 10

    A Bayesian analysis shows that a future sub-solar PBH detection would make the primordial SIGW interpretation of PTA data favored over the SMBH interpretation, but this preference is driven by the detection prior.

  6. Considering lensing effect on gravitational wave signals from black holes in mass gap

    astro-ph.HE 2025-12 reject novelty 4.0 of 10

    Gravitational lensing could in principle explain apparent mass-gap black-hole mergers, but the required magnifications are μ≈12–39 for GW190521 and μ≈320–444 for GW231123 depending on assumptions—and the paper's abstr...

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