A meta-analysis of 1490 BBH merger rate predictions from 57 studies shows substantial subsets reproduce or underestimate the observed rate, indicating that apparent crises are model-dependent rather than universal.
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GWTC-4 data reveals three sub-populations of binary black holes with distinct delay-time distributions that depend on mass above 45 solar masses, mass-ratio, and spin, ruling out a single universal merger rate.
Detection of GW190814 from the coalescence of a 23 solar-mass black hole and a 2.6 solar-mass compact object, the most unequal-mass binary yet observed with gravitational waves.
BBH-Genesis applied to GWTC-4 finds strongest support for a two-channel model of binary black hole populations with possible mild evidence for an AGN-related third channel.
Interstellar objects may contribute enough baryonic mass to reduce the local dark matter halo density to 0.24 GeV/cm³.
Simulations indicate that catalogs of more than 200 events are needed to precisely measure the neutron-star mass fraction f_NS(m) and over 100 events to rule out all low-mass objects being black holes using gravitational-wave data alone.
Extended-data Bayesian reanalysis of GW190814 finds no evidence for tertiary-induced line-of-sight acceleration or residual eccentricity due to strong degeneracy between the two effects.
citing papers explorer
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Lower Your Rates: On Claims of a Binary Black Hole Merger-Rate Crisis
A meta-analysis of 1490 BBH merger rate predictions from 57 studies shows substantial subsets reproduce or underestimate the observed rate, indicating that apparent crises are model-dependent rather than universal.
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The First Detection of Sub-Populations in the Delay-Time Distribution of Binary Black Holes in GWTC-4 of LIGO-Virgo-KAGRA
GWTC-4 data reveals three sub-populations of binary black holes with distinct delay-time distributions that depend on mass above 45 solar masses, mass-ratio, and spin, ruling out a single universal merger rate.
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GW190814: Gravitational Waves from the Coalescence of a 23 M$_\odot$ Black Hole with a 2.6 M$_\odot$ Compact Object
Detection of GW190814 from the coalescence of a 23 solar-mass black hole and a 2.6 solar-mass compact object, the most unequal-mass binary yet observed with gravitational waves.
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BBH-Genesis: Disentangling Binary Black Hole Formation Channels with GWTC-4
BBH-Genesis applied to GWTC-4 finds strongest support for a two-channel model of binary black hole populations with possible mild evidence for an AGN-related third channel.