Ludovica Crosato Menegazzi: Variety of disk wind-driven explosions in massive rotating stars
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Europe/Stockholm
Description
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 (M>16M_sun), 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 (E_expl>10^52 erg) supernovae with a high 56Ni mass (M_56Ni> 0.1 M_sun).
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 the56Ni mass distribution with observational data, focusing on the late-phase mass ejection after BH formation.
