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astro-ph.HE2026
When the black holes align: a subpopulation of aligned massive binary black holes observed via gravitational waves
Stefano Rinaldi, Charmaine Wong, M. Paola Vaccaro +4
In this work, we investigate the features present in the joint primary mass and effective spin distribution of binary black holes without relying on specific modelling assumptions.…
astro-ph.GA2026
Black hole populations and hierarchical growth across the AGN parameter space
Maria Paola Vaccaro, Michela Mapelli, Alessandro Alberto Trani +1
Active galactic nuclei (AGNs) have been proposed as efficient environments for the formation of binary black holes (BBHs). We present an updated semi-analytical framework for BBH f…