A new model emphasizing secondary mass features and pairing transitions improves spectral siren H0 constraints by ~30% using 142 GW events from GWTC-4.0.
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Updated ANC constraints on the 12C(alpha,gamma)16O S-factor favor lower values than prior evaluations and imply a black-hole mass-gap lower edge of 61-75 solar masses.
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Secondary-Mass Features improve Spectral-Siren $H_0$ Constraints
A new model emphasizing secondary mass features and pairing transitions improves spectral siren H0 constraints by ~30% using 142 GW events from GWTC-4.0.
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Nuclear Constraints on $^{12}$C$(\alpha,\gamma)^{16}$O and Their Impact on Black-Hole Mass Predictions
Updated ANC constraints on the 12C(alpha,gamma)16O S-factor favor lower values than prior evaluations and imply a black-hole mass-gap lower edge of 61-75 solar masses.