Shadows of our Former Companions: How the Single-Degenerate Binary Type Ia Supernova Scenario Affects Remnants

TL;DR

This study uses high-resolution 3D simulations to show that non-degenerate companions in Type Ia supernovae create long-lasting, observable holes in the ejecta, affecting remnant evolution over centuries.

Contribution

It provides new insights into how companion stars influence supernova remnants, highlighting the long-term effects of the binary scenario on observable features.

Findings

The companion creates a long-lived hole in the supernova ejecta.

The hole persists for centuries after interaction with the interstellar medium.

The hole remains detectable across various viewing angles and companion masses.

Abstract

Here we present three-dimensional high resolution simulations of Type Ia supernova in the presence of a non-degenerate companion. We find that the presence of a nearby companion leaves a long-lived hole in the supernova ejecta. In particular, we aim to study the long term evolution of this hole as the supernova ejecta interacts with the surrounding interstellar medium. Using estimates for the x-ray emission, we find that the hole generated by the companion remains for many centuries after the interaction between the ejecta and the interstellar medium. We also show that the hole is discernible over a wide range of viewing angles and companion masses.