General Relativistic Three-Dimensional Multi-Group Neutrino Radiation-Hydrodynamics Simulations of Core-Collapse Supernovae

TL;DR

This paper presents advanced 3D general relativistic neutrino radiation-hydrodynamics simulations of core-collapse supernovae, revealing the importance of resolution and full 3D modeling in accurately capturing explosion dynamics.

Contribution

It introduces a comprehensive 3D multi-group neutrino transport scheme and demonstrates the impact of resolution and symmetry assumptions on supernova explosion outcomes.

Findings

Unconstrained 3D simulation develops asymmetric explosion.

Low resolution artificially promotes earlier explosion.

Full 3D simulation at high resolution shows explosion onset, unlike octant symmetry.

Abstract

We report on a set of long-term general-relativistic three-dimensional (3D) multi-group (energy-dependent) neutrino-radiation hydrodynamics simulations of core-collapse supernovae. We employ a full 3D two-moment scheme with the local M1 closure, three neutrino species, and 12 energy groups per species. With this, we follow the post-core-bounce evolution of the core of a nonrotating $27$-$M_\odot$ progenitor in full unconstrained 3D and in octant symmetry for $\gtrsim$$ 380\,\mathrm{ms}$. We find the development of an asymmetric runaway explosion in our unconstrained simulation. We test the resolution dependence of our results and, in agreement with previous work, find that low resolution artificially aids explosion and leads to an earlier runaway expansion of the shock. At low resolution, the octant and full 3D dynamics are qualitatively very similar, but at high resolution, only the full 3D simulation exhibits the onset of explosion.