Image Details
Caption: Figure 9.
Comparison of the low-mass core helium-burning phase from YREC (solid) and PARSEC v2.0 (dashed) from the beginning of central core helium burning to Ycen = 10−3, except where noted with “*.” The tracks include masses between and including 0.8M⊙ and 2.4M⊙ in steps of 0.4M⊙ and 3M⊙ and 8M⊙ in steps of 1M⊙. The low-mass PARSEC v2.0 models, which have suppressed helium ingestion episodes, generally reach core helium exhaustion at lower luminosities than YREC models, which experience helium ingestion episodes that allow for continued growth of the core and extension to larger luminosities.
© 2026. The Author(s). Published by the American Astronomical Society.