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Evidence for the evolution of black hole mass function with redshift

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arxiv 2310.03074 v2 pith:B5VS3B7E submitted 2023-10-04 astro-ph.HE astro-ph.GAgr-qc

Stefano Rinaldi , Walter Del Pozzo , Michela Mapelli , Ana Lorenzo-Medina , Thomas Dent This is my paper
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keywords massredshiftdistributionblackprimaryratioevidenceevolution
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abstract

We investigate the joint primary mass, mass ratio, and redshift observed distribution of astrophysical black holes using the gravitational wave events detected by the LIGO-Virgo-KAGRA collaboration and included in the third gravitational wave transient catalogue. We reconstruct this distribution using Bayesian non-parametric methods, which are data-driven models able to infer arbitrary probability densities under minimal mathematical assumptions. We find evidence for the evolution with redshift of both the primary mass and mass ratio distribution: our analysis shows the presence of two distinct sub-populations in the primary mass - redshift plane, with the lighter population, $\lesssim$ 20 $M_\odot$, disappearing at higher redshifts, $z > 0.4$. The mass ratio distribution shows no support for symmetric binaries. The observed population of coalescing binary black holes evolves with look-back time, suggesting a trend in metallicity with redshift and/or the presence of multiple, redshift-dependent formation channels.

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Cited by 2 Pith papers

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

  1. A Four-dimensional Model-agnostic Probe into the Astrophysical Origins of Binary Black Hole Subpopulations

    astro-ph.HE 2026-07 conditional novelty 7.0 of 10

    A GPU-accelerated binned Gaussian process yields the first model-agnostic 4D BBH population in (m1, q, χeff, χp), revealing four mass-based subpopulations and new spin-mass-ratio correlations.

  2. The fault in our sirens: Hierarchical diagnosis of waveform systematics in Hubble-Lema\^itre constant measurements

    gr-qc 2025-07 conditional novelty 6.0 of 10

    A 5% subpopulation of high-mass, spin-precessing black hole binaries, poorly modeled by current waveforms, makes future dark-siren Hubble constant measurements unreliable, and a hierarchical variance diagnostic can de...

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