Large-Scale Instability in Supernovae and the Neutrino Spectrum

Abstract

A large fraction of the energy released during the gravitational collapse of the core of a massive star is carried by neutrinos. Neutrinos play the main role in explaining core-collapse supernovae. A self-consistent formulation of the gravitational collapse is solved using multidimensional gas dynamics, taking into account the spectral transport of neutrinos in the framework of neutrino diffusion with diffusion the fluxes limiters. Large scale convection leads to an increase in the mean energy of the neutrinos up to 15 MeV in compare with the spherically-symmetric case, which is important for explaining supernovae. Additionally we considered the collapse in the 3D case with the neutrino transport without the spectrum to specify the role of the modest rotation in the formation of the large scale convection.