An advanced leakage scheme for neutrino treatment in astrophysical simulations

Understand

We present an Advanced Spectral Leakage (ASL) scheme to model neutrinos in the context of core-collapse supernovae and compact binary mergers.

• Based on previous gray leakage schemes, the ASL scheme computes the neutrino cooling rates by interpolating local production and diffusion rates (relevant in optically thin and thick regimes, respectively), separately for discretized values of the neutrino energy.
• Neutrino trapped components are also modeled, based on equilibrium and timescale arguments.
• The better accuracy achieved by the spectral treatment allows a more reliable computation of neutrino heating rates in optically thin conditions.