Le 15 mars 2019
De 10h30 à 12h00
Luc Dessart
Observatoire de la Côte d’Azur
Nearly all stars above 8Msun eventually form a degenerate metal-rich core and collapse. This collapse may be followed by a powerful, neutrino-driven, explosion ejecting several solar masses of material, including metals from the progenitor He core as well as radioactive isotopes. H-rich events, which arise from red and more rarely from blue supergiants, exhibit a large diversity of light curve and spectral properties. In this talk, I will present some experiments that aim at understanding the processes at the origin of this diversity. I will also, if time permits, discuss the degeneracies associated with light curve modeling, which prevent a robust inference of the ejecta/progenitor masses of Type II supernovae from red supergiants.