Variety of disk wind-driven explosions in massive rotating stars
Ludovica Crosato Menegazzi (Albert Einstein Institute, Postdam)
Tuesday 18/02/2025 @ 14:00, Sala Antonio Sollima (IV piano Battiferro)
At the end of its evolution, the collapse of a massive star’s core into a proto-neutron star is the starting point for a complex sequence of events with many possible outcomes. Specifically, very compact and rotating stars with a high mass, are likely to create a so-called “failed core-collapse supernova”, forming a black hole surrounded by an accreting disk. It has been shown that the disk wind generated through viscous dissipation inside the disk may be the source of high energy supernovae with a high 56Ni mass. In this scenario, the properties of the ejecta and the 56Ni production are strongly related to the wind injection from the accretion disk. In this talk, I will analyze these properties, investigating the impact of the disk mass and energy injected from the system on the final ejecta. I will focus on observational properties such as the explosion energy, the ejecta mass, and the 56Ni mass produced for different progenitor model. I will then show the strong correlation between the explosion energy and the ejecta mass, and compare our results for the 56Ni mass distribution with observational data, focusing on the late-phase mass ejection after BH formation.