Daniel Kresse: Post-explosion Hydrodynamics in 3D Neutrino-driven Supernova Models

Thursday 28 Nov 2024, 13:15 → 14:00 Europe/Stockholm

A5:1003 (AlbaNova Main Building)

Core-collapse supernovae (CCSNe) are among the brightest and most 
 energetic events in the Universe. They mark the violent, explosive 
 deaths of massive stars and give birth to neutron stars (NSs) and black 
 holes (BHs), the most exotic compact objects known. After decades of 
 intense research, the "neutrino-driven explosion mechanism" has 
 meanwhile been established as the most promising and widely accepted 
 paradigm for ("standard" Type II) CCSNe. Nevertheless, the question 
 remained whether the neutrino-driven mechanism can explain the 
 characteristic properties of observed supernovae, such as explosion 
 energies, nucleosynthesis yields, and NS and BH kicks and spins. In my 
 talk, I will address this question by presenting most recent results 
 from a large set of three-dimensional (3D) neutrino-hydrodynamics 
 simulations of the Garching group that extend over timescales of many 
 seconds, i.e., significantly beyond the times when the explosions are 
 launched. I will show that the highly non-linear post-explosion dynamics 
 of 3D CCSN models with coexisting in- and outflows enable the 
 long-lasting growth of the explosion energy, the efficient production of 
 radioactive isotopes such as 44Ti and 56Ni, and the development of 
 large-scale ejecta asymmetries, with important implications for NS and 
 BH natal kicks and spins. Our results demonstrate that state-of-the-art 
 3D models of neutrino-driven CCSNe — if evolved over sufficiently long 
 timescales — can reproduce the typical explosion properties as deduced 
 from astronomical observations.