Compact object mergers: exploring uncertainties from stellar and binary evolution with SEVN

Understand

Population-synthesis codes are an unique tool to explore the parameter space of massive binary star evolution and binary compact object (BCO) formation.

• Most population-synthesis codes are based on the same stellar evolution model, limiting our ability to explore the main uncertainties.
• Here, we present the new version of the code SEVN, which overcomes this issue by interpolating the main stellar properties from a set of pre-computed evolutionary tracks.
• We describe the new interpolation and adaptive time-step algorithms of SEVN, and the main upgrades on single and binary evolution.