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arxiv: 2506.02316 · v2 · pith:2IMXXISBnew · submitted 2025-06-02 · 🌌 astro-ph.SR · astro-ph.HE· astro-ph.IM

Rapid stellar and binary population synthesis with COMPAS: methods paper II

Ilya Mandel , Jeff Riley , Adam Boesky , Adam Brcek , Ryosuke Hirai , Veome Kapil , Mike Y. M. Lau , JD Merritt
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Nicol\'as Rodr\'iguez-Segovia Isobel Romero-Shaw Yuzhe Song Simon Stevenson Avi Vajpeyi L. A. C. van Son Alejandro Vigna-G\'omez Reinhold Willcox
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classification 🌌 astro-ph.SR astro-ph.HEastro-ph.IM
keywords compasbinarycodemethodspopulationrapidstellarsynthesis
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The COMPAS public rapid binary population synthesis code has undergone a number of key improvements since the original COMPAS methods paper (Team COMPAS: Riley et al., 2022) was published. These include more sophisticated and robust treatments of binary interactions: mass transfer physics, common-envelope events, tides and gravitational-wave radiation reaction; and updated prescriptions for stellar evolution, winds and supernovae. The code structure and outputs have also been updated, with a focus on improving resolution without sacrificing computational speed. This paper describes the substantive changes in the code between the previous methods paper and COMPAS v03.22.01.

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