Image Details
Caption: Figure 15.
Left: comparison of optical (black) and NIR (gray) spectra of SN 2024iss at nebular phases to He-star models (﹩{M}_{{\rm{preSN}}}=3.8-5.6\,\,{M}_{\odot }﹩) from L. Dessart et al. (2021). Line identifications are shown in blue. Right: comparison of the SN 2024iss NIR spectrum (black) to a ﹩{M}_{{\rm{preSN}}}=4.4\,\,{M}_{\odot }﹩ He-star model (red) from L. Dessart (2025).
© 2026. The Author(s). Published by the American Astronomical Society.