Distinct spin properties and astrophysical origin of low mass binary black holes in gravitational wave data

arXiv:2607.00565 · astro-ph.HE · Submitted 2026-07-01 · Read on arXiv

Elizabeth Flanagan, Jakob Stegmann, Isobel Romero-Shaw, Thomas Callister, Aleksandra Olejak, Fabio Antonini

astro-ph.HE

Submitted: 2026-07-01

Code: https://github.com/ax-ml/jax

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Core — 5× in this paper · explained in 2 episodes
• Alignment — 2× in this paper · explained in 1 episode
• Bayesian Inference — 2× in this paper · explained in 5 episodes
• Science and Technology Facilities Council — 2× in this paper
• Abundance — 1× in this paper · explained in 1 episode
• Academia Sinica — 1× in this paper
• Observational Selection Effects — 1× in this paper · explained in 2 episodes

Sources

• GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• Phase Space of Binary Black Holes from Gravitational Wave Observations to Unveil its Formation History
• Binary Black Hole Phase Space Discovers the Signature of Pair Instability Supernovae Mass Gap
• Evidence for additional structure in the effective spin distribution hints at multiple formation pathways in GWTC-5.0
• Isolated or Dynamical? Tracing Black Hole Binary Formation through the Population of Gravitational-Wave Sources
• Revising the Spin and Kick Connection in Isolated Binary Black Holes
• Evidence for Three Subpopulations of Merging Binary Black Holes at Different Primary Masses
• On the effective spin-mass ratio relation of binary black hole mergers that evolved in isolation
• The first decade of gravitational-wave measurements of black hole spins
• Precision Requirements for Monte Carlo Sums within Hierarchical Bayesian Inference
• Transitions in the Mass-ratio and Spin Properties of Binary Black Holes in GWTC-5
• Compactness Peaks and Subpopulations: Probing Stellar Physics and Formation Channels of Merging Binary Black Holes
• Cosmic Cousins: Identification of a Subpopulation of Binary Black Holes Consistent with Isolated Binary Evolution
• Hints of spin-magnitude correlations and a rapidly spinning subpopulation of binary black holes
• Astrophysics informed Gaussian processes for gravitational-wave populations: Evidence for the onset of the pair-instability supernova mass gap
• Getting Tilted: Random Walk of Binary Black Hole Spin-Orbit Alignment in Dense Star Clusters
• BBH-Genesis: Disentangling Binary Black Hole Formation Channels with GWTC-4
• Composable Effects for Flexible and Accelerated Probabilistic Programming in NumPyro
• Signatures of a subpopulation of hierarchical mergers in the GWTC-4 gravitational-wave dataset
• Reversible-jump MCMC reveals binary black hole subpopulations with distinct redshift evolution

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