CCSN Simulation with Spectral Two-Moment Neutrino Transport Using Flash-X

We are developing the toolkit for high-order neutrino-radiation hydrodynamics (thornado) to simulate neutrino transport and its coupling to matter in core-collapse supernova (CCSN) explosions.

thornado, which implements spectral two-moment neutrino transport with a high-order discontinuous Galerkin method and implicit-explicit time-stepping, and WeakLib\footnote{github.com/starkiller-astro/weaklib}, a microphysics library that provides tabulated microphysics, have been coupled with the simulation framework Flash-X.

With this enhanced Flash-X code, we will simulate CCSN explosions in multiple spatial dimensions.

Here we present our latest results: 1. A detailed comparison between spherically-symmetric simulations, beginning with a 9 Solar-mass progenitor, obtained using different two-moment closure methods with thornado transport with relativistic corrections. 2. Spherically-symmetric simulations of three low-mass, Solar-metallicity progenitors using the SFHo equation of state, electron-flavor ‘’Bruenn 85’’ neutrino opacities, Flash-X hydrodynamics, and thornado transport.