Exploding Core-Collapse Supernovae by Jets-Driven Feedback Mechanism

TL;DR

This study uses 2.5D hydrodynamical simulations to demonstrate that jittering jets launched by accretion disks around neutron stars can effectively eject the core in supernova explosions through a feedback mechanism.

Contribution

It provides the first detailed simulation evidence supporting the jittering jets model as a viable core-collapse supernova explosion mechanism.

Findings

Jets inflate hot bubbles that expel gas in all directions.

Sufficient mass (0.1 solar masses) is accreted mainly from the equatorial plane.

The feedback mechanism regulates jet activity and core ejection.

Abstract

We study the flow structure in the jittering-jets explosion model of core-collapse supernovae (CCSNe) using 2.5D hydrodynamical simulations and find that some basic requirements for explosion are met by the flow. In the jittering-jets model jets are launched by intermittent accretion disk around the newly born neutron star and in stochastic directions. They deposit their kinetic energy inside the collapsing core and induce explosion by ejecting the outer core. The accretion and launching of jets is operated by a feedback mechanism: when the jets manage to eject the core, the accretion stops. We find that even when the jets' directions are varied around the symmetry axis they inflate hot bubbles that manage to expel gas in all directions. We also find that although most of the ambient core gas is ejected outward, sufficient mass to power the jets is accreted (0.1Mo), mainly from the equatorial plane direction. This is compatible with the jittering jets explosion mechanism being a feedback mechanism.