2024/08/31 by Minori Shikauchi, Ryosuke Hirai, Shikauchi, Minori +3 · 4 citations
Biochemistry, Genetics and Molecular Biology · Earth and Planetary Sciences · #FOS: Physical sciences #Geological Studies and Exploration #Geological and Geophysical Studies #Geomagnetism and Paleomagnetism Studies #High Energy Physics - Theory (hep-th) #Solar and Stellar Astrophysics (astro-ph.SR)
paper · pdf · doi:10.48550/arxiv.2409.00460
openalex publication_date 2024/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We construct a semi-analytical model that describes the convective core mass evolution of massive stars experiencing mass loss during the main-sequence stage. We first conduct a suite of 1D stellar evolution calculations to build insight into how convective core masses behave under idealized mass loss. Based on these simulations, we find several universal relations between global properties of the star that hold regardless of the mass loss history. By combining these relations, we construct a semi-analytic framework that can predict the convective core mass evolution for arbitrary mass loss histories and hence the helium core mass at the end of the main sequence. Our formulae improve upon existing methods for predicting the core mass in rapid population synthesis codes.