Speaker
Description
Neutrinos play a crucial role in the explosion mechanism of core-collapse supernovae. Including them in simulations requires to solve the Boltzmann equation, which is very expensive to solve because of its higher dimensionality. Most simulations therefore rely on approximations to that equation that are more affordable. The effect of these approximations on the evolution of the system and on the observables is however difficult to estimate. Therefore, we implemented a full Boltzmann solver in the code Gmunu that we will use to compare simulations with and without approximations to the equation. In this talk, we present the full Boltzmann solver and present the two parts of the project. The first one consists simulating axisymmetric core-collapse supernovae with the M1 approximate scheme and analyze the gravitational wave emission, for which we discuss preliminary results. The second part consists in using the Boltzmann solver to investigate the impact of the approximate scheme on the neutrino and gravitational wave signals.
