AR 15021 (Archival Research)

Thu Jul 18 14:21:32 GMT 2024

Principal Investigator: Jim Fuller
PI Institution: California Institute of Technology
Investigators (xml)

Title: Pre-supernova properties of progenitors detected by HST
Cycle: 25

HST has provided essential data on the connection between core-collapse supernovae (SNe) and their massive star progenitors, both through precise post-explosion localization of nearby SNe, and by identification of progenitor stars in pre-explosion HST images. However, mounting evidence suggests that many SN progenitors exhibit outbursts and/or enhanced mass loss in the years preceding the SN, potentially affecting the progenitor properties measured by HST. Inferring progenitor characteristics such as stellar mass thus requires a better theoretical understanding of the pre-SN stellar evolution. A compelling mechanism for pre-SN outbursts is energy transport via gravity/acoustic waves within massive star SN progenitors. We propose to quantify the observable effects of wave-driven outbursts and mass loss in the final years of massive star lives using stellar evolution calculations incorporating wave energy transport. Our models will make predictions for progenitor luminosity in HST bands as a function of stellar mass and time before SN explosion. We will also model the SN light curves and spectra of stars with wave energy transport, which we can compare with SN observations to assert whether wave heating operated in the progenitors detected by HST. We will then revisit the interpretation of HST progenitor data and make predictions for future SN progenitor detections by HST.