Assembling GW231123 in star clusters through the combination of stellar binary evolution and hierarchical mergers
Published in accepted on ApJL, 2025
Recommended citation: Paiella, L., et al. (2025). "Assembling GW231123 in star clusters through the combination of stellar binary evolution and hierarchical mergers." arXiv e-prints. https://arxiv.org/abs/2509.10609
In this paper, we explore the dynamical formation of GW231123-like events in different cluster environments using the B-POP code, exploring how stellar mergers in primordial binaries and hierarchical mergers contribute to the assembly of these ligh IMBH binaries. We investigate different metallicities and spin prescriptions for the remnants of the stellar mergers and estimate the rate of these events for Milky-way like and dwarf galaxies.