Not all spins of black-hole binaries formed in clusters are isotropic and not all spins of black-hole binaries formed in isolation are aligned

arXiv:2609.31879 · astro-ph.HE, gr-qc · Submitted 2026-09-25 · Read on arXiv

astro-ph.HE, gr-qc

Submitted: 2026-09-25

Updated: 2026-09-25

Terminology

• Alignment — 13× in this paper · explained in 1 episode
• Robustness — 3× in this paper · explained in 5 episodes
• Aperture — 2× in this paper · explained in 1 episode
• Generalization — 2× in this paper · explained in 13 episodes
• AGN — 1× in this paper · explained in 1 episode
• Core — 1× in this paper · explained in 2 episodes

Sources

• GWTC-5.0: Population Properties of Merging Compact Binaries
• Merging stellar-mass binary black holes
• Hierarchical mergers of stellar-mass black holes and their gravitational-wave signatures
• Constraining the fraction of binary black holes formed in isolation and young star clusters with gravitational-wave data
• One Channel to Rule Them All? Constraining the Origins of Binary Black Holes using Multiple Formation Pathways
• Black Hole Formation in Failing Core-Collapse Supernovae
• Most Black Holes are Born Very Slowly Rotating
• Illuminating Black Hole Binary Formation Channels with Spins in Advanced LIGO
• Hierarchical analysis of gravitational-wave measurements of binary black hole spin-orbit misalignments
• Use of gravitational waves to probe the formation channels of compact binaries
• Determining the population properties of spinning black holes
• Spin orientations of merging black holes formed from the evolution of stellar binaries
• Dropping Anchor: Understanding the Populations of Binary Black Holes with Random and Aligned Spin Orientations
• Spin-Orbit Misalignment in Close Binaries with Two Compact Objects
• The origin of spin in binary black holes: Predicting the distributions of the main observables of Advanced LIGO
• Flipping spins in mass transferring binaries and origin of spin-orbit misalignment in binary black holes
• A Diverse Distribution of Black Hole Spins from Stable Mass Transfer
• Resonant-plane locking and spin alignment in stellar-mass black-hole binaries: a diagnostic of compact-binary formation
• Pathways for producing binary black holes with large misaligned spins in the isolated formation channel
• Revising the Spin and Kick Connection in Isolated Binary Black Holes

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