An explanation for the peculiar periphery of supernova remnant G309.2-0.6

TL;DR

This paper uses 3D hydrodynamical simulations to explain the peculiar periphery of supernova remnant G309.2-0.6, suggesting it originated from a jet-driven core-collapse supernova, with jets contributing 10-15% of the total energy.

Contribution

The study provides a novel simulation-based explanation for the remnant's morphology, emphasizing the role of jets in core-collapse supernovae.

Findings

Jet energy accounts for 10-15% of total ejecta energy.

Simulation reproduces the remnant's peculiar ears and circular shell.

Supports jet-driven supernova origin hypothesis.

Abstract

Supernova remnant (SNR) G309.2-0.6 has a peculiar radio morphology with two bright ears to the southwest and northeast, although the main shell outside the ears is roughly circular. Based on an earlier proposal that the supernova ejecta has a jet component with extra energy, the dynamical evolution of the remnant is solved using 3D hydrodynamical (HD) simulation to investigate the formation of the periphery of the remnant. Assuming the ejecta with a kinetic energy of $10^{51}$\,erg and a mass of $3~\mathrm{M}_{\odot}$ evolved in a uniform ambient medium for a time of $\sim 4000$\,yr and the jet component has cylindrical symmetry with a half open angle of $10^\circ$, the result indicates that the energy contained in the jet is about $10-15\%$ of the kinetic energy of the entire ejecta to reproduce the detected profile. This study supports that the remnant originated from a jet-driven core-collapse supernova.