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

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arxiv 2506.02316 v2 pith:2IMXXISB submitted 2025-06-02 astro-ph.SR astro-ph.HEastro-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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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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Cited by 4 Pith papers

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  1. Hydrodynamic Response of Mildly Evolved Common Envelope Donors in Luminous Red Novae

    astro-ph.SR 2026-05 unverdicted novelty 7.0

    3D hydro simulations demonstrate that donor central concentration (ρ_c/ρ_bar) controls inspiral morphology and mass-ejection history in common-envelope events for luminous red novae.

  2. Evolution of Massive Main-sequence Stars in Rapid Population Synthesis. I. Framework and Implementation

    astro-ph.SR 2025-12 unverdicted novelty 6.0

    A new main-sequence evolution framework implemented in COMPAS yields more massive helium cores, more compact stripped-star radii, and systematically higher black-hole masses than standard prescriptions.

  3. Gravitational Lensing of Gravitational Waves from Astrophysical Sources: Theory, Detection, and Applications

    astro-ph.HE 2026-05 unverdicted novelty 2.0

    A review of gravitational lensing of astrophysical gravitational waves, outlining theory in geometric and wave optics, identification methods, predicted rates, and applications to dark matter and cosmology.

  4. Gravitational Lensing of Gravitational Waves from Astrophysical Sources: Theory, Detection, and Applications

    astro-ph.HE 2026-05 unverdicted novelty 2.0

    This review summarizes the theory, detection methods, and cosmological applications of gravitationally lensed gravitational waves from astrophysical sources such as compact binary mergers.