Post-explosion positive jet-feedback activity in inner ejecta of core collapse supernovae

TL;DR

This study uses 3D hydrodynamical simulations to show that weak jets launched shortly after a core-collapse supernova can induce backflow, influence inner ejecta morphology, and potentially create bipolar structures in remnants.

Contribution

It demonstrates that post-explosion weak jets can significantly affect supernova ejecta morphology through backflow and additional jet activity, a novel insight into supernova remnant shaping.

Findings

Weak jets induce high-pressure zones and backflow in ejecta.

Backflow can power more energetic secondary jets.

Inner ejecta may display bipolar structures due to post-explosion jets.

Abstract

We conduct three-dimensional hydrodynamical simulations of weak jets that we launch into a core collapse supernovae (CCSNe) ejecta half an hour after the explosion and find that the interaction of the fast jets with the CCSN ejecta creates high pressure zones that induce a backflow that results in mass accretion onto the newly born neutron star. In cases of weak jets, a total power of 10^45-10^46 erg, the backflow mass accretion might power up to an order of magnitude more energetic jets. In total, the jets of the two post-explosion jet-launching episodes have enough energy to influence the morphology of the very inner ejecta, a mass of 0.1 M_O. Our results imply that in some, probably a minority of, CCSN remnants the very inner regions might display a bipolar structure that results from post-explosion weak jets. The regions outside this part might display the morphology of jittering jets.