Astro Seminar: Daniel Kresse

Daniel Kresse (MPA) - Post-explosion Hydrodynamics in 3D Neutrino-driven Supernova Models

Date and time: 02.12.2024 at 2:15 PM

Place: Auditorium A, Blegdamsvej 17

Abstract: 

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.