Abstract :
The fate of massive stars at the end of their lives is influenced not only by the physics of their explosions but also by their final core structures and outer envelopes at the moment of collapse. Some massive stars end as supernovae, leaving behind neutron stars, while others may collapse directly into black holes. Since the majority of massive stars are in binary or higher-order multiple systems, interactions within these systems can critically influence these aspects of stellar evolution. In this talk, I will present findings from a multi-metallicity study using the binary population synthesis code POSYDON. This talk highlights how physically motivated populations including binaries influence the delay time distributions, supernova types, energy output, and progenitor properties across different metallicity environments.
