Explosion geometry of a rotating 13 $M_{\odot}$ star driven by the SASI-aided neutrino-heating supernova mechanism

TL;DR

This study uses axisymmetric hydrodynamic simulations with spectral neutrino transport to investigate how rotation influences the explosion geometry of a 13 solar mass star in core-collapse supernovae, highlighting the role of SASI and convection.

Contribution

It demonstrates that rotation favors bipolar explosion geometries and that symmetric bipolar explosions can produce higher energies than unipolar ones.

Findings

Rotation increases likelihood of bipolar explosions.

Symmetric bipolar explosions yield higher energies.

Neutrino-heating mechanism with SASI supports supernova initiation.

Abstract

By performing axisymmetric hydrodynamic simulations of core-collapse supernovae with spectral neutrino transport based on the isotropic diffusion source approximation scheme, we support the assumption that the neutrino-heating mechanism aided by the standing accretion shock instability and convection can initiate an explosion of a 13 $M_{\odot}$ star. Our results show that bipolar explosions are more likely to be associated with models which include rotation. We point out that models, which form a north-south symmetric bipolar explosion, can lead to larger explosion energies than for the corresponding unipolar explosions.