Speaker
Description
Understanding the evolution of primordial black hole (PBH) populations across cosmic history is critical for reconciling observational data with theoretical formation models. Previous studies showed that gas accretion can significantly alter the mass and spin distributions of PBH binaries from their formation time to the low-redshift universe where gravitational wave signals are observed. However, such accretion is inherently coupled to radiative feedback: the emitted radiation and localised heating of ambient gas can suppress accretion rates, an effect previously highlighted for isolated PBHs. In this work, we review the accretion-driven evolution of PBH binaries, focusing on the incorporation of radiative heating feedback into our modelling of accretion.
