PopCORN: Hunting down the differences between binary population synthesis codes

摘要: Context. Binary population synthesis (BPS) modelling is a very effective tool to study the evolution and properties of various types close binary systems. The uncertainty in parameters model their effect on can be tested statistical way, which then leads deeper understanding underlying (sometimes poorly understood) physical processes involved. Several BPS codes exist that have been developed with different philosophies aims. Although has successful for studies many populations stars, particular case progenitors supernovae Type Ia, predicted rates ZAMS vary substantially between codes. Aims. To understand predictive power codes, we similarities differences predictions four low- intermediate-mass binaries. We investigate characteristics populations, whether they are caused by assumptions made or numerical effects, e.g. lack accuracy Methods. compare large number evolutionary sequences starting same initial conditions following until first (and when applicable, second) white dwarf (WD) formed. simplify complex problem comparing based (often different) assumptions, equalise as much possible examine inherent Results. find simulated similar Regarding binaries one WD, there good agreement characteristics, channels lead birth these systems, birthrates. double WD population, create WDs rough population. progenitor systems single system do not, agree well. Most importantly, two from not due differences, but because assumptions. identify critical need studied more detail.