No evidence for core-collapse formed low-spin IMBHs in GWTC-4, with 90% upper limit on merger rate of 0.077 Gpc^{-3} yr^{-1}, low-spin BH mass truncation at 65 solar masses consistent with pair-instability gap lower edge, and high-spin IMBHs from hierarchical mergers.
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2 Pith papers cite this work. Polarity classification is still indexing.
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astro-ph.HE 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
Non-parametric analysis of GWTC-5.0 data supports multiple subpopulations of binary black holes distinguished by effective spin, with one aligned subpopulation suggesting dynamical formation.
citing papers explorer
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How do the LIGO-Virgo-KAGRA's Heavy Black Holes Form? No evidence for core-collapse Intermediate-mass black holes in GWTC-4
No evidence for core-collapse formed low-spin IMBHs in GWTC-4, with 90% upper limit on merger rate of 0.077 Gpc^{-3} yr^{-1}, low-spin BH mass truncation at 65 solar masses consistent with pair-instability gap lower edge, and high-spin IMBHs from hierarchical mergers.
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When the black holes align: a subpopulation of aligned massive binary black holes observed via gravitational waves
Non-parametric analysis of GWTC-5.0 data supports multiple subpopulations of binary black holes distinguished by effective spin, with one aligned subpopulation suggesting dynamical formation.