GWTC-4.0: Population Properties of Merging Compact Binaries
Adrian Abac; I. Abouelfettouh; F. Acernese; K. Ackley; Christian Adamcewicz; S. Adhicary; D. Adhikari; N. Adhikari · 2026 · The Astrophysical Journal Letters
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Abstract
Abstract We detail the population properties of binary neutron star, neutron star–black hole binary, and binary black hole mergers using 158 events from the cumulative Gravitational-Wave Transient Catalog 4.0. The black hole primary mass distribution consists of a power-law-like continuum that steepens above 35 M ⊙ with overdensities at 10 M ⊙ and 35 M ⊙ . Binary black holes with primary masses near 10 M ⊙ are more likely to have less massive secondaries, with a mass ratio distribution peaking at q = 0.7 1 − 0.11 + 0.12 , potentially a signature of stable mass transfer during binary evolution.
Abstract by Adrian Abac; I. Abouelfettouh; F. Acernese; K. Ackley; Christian Adamcewicz; S. Adhicary; D. Adhikari; N. Adhikari, The Astrophysical Journal Letters (2026) — licensed CC BY 4.0.
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Metadata source: OpenAlex · DOI 10.3847/2041-8213/ae771e