A data-driven 'pi stroke' analysis of GWTC-4 reveals a secondary-black-hole mass gap at 38-120 solar masses, a possible chi1-chi2 spin correlation, and suggests the chi-eff-q anti-correlation may be a model artifact.
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Trends in the Population of Binary Black Holes Following the Fourth Gravitational-Wave Transient Catalog: a Data-Driven Analysis
A data-driven 'pi stroke' analysis of GWTC-4 reveals a secondary-black-hole mass gap at 38-120 solar masses, a possible chi1-chi2 spin correlation, and suggests the chi-eff-q anti-correlation may be a model artifact.