# Supernova Remnants as Clues to Their Progenitors

## TL;DR

This paper reviews how observations of supernova remnants reveal key details about their progenitor stars, including chemical and dynamical properties, and discusses differences between types of supernova remnants and recent modeling advances.

## Contribution

It provides a comprehensive overview of how supernova remnant observations can infer progenitor properties and distinguishes features of different supernova types.

## Key findings

- Chemical composition and dynamics reveal progenitor characteristics.
- Differences between core collapse and thermonuclear supernova remnants.
- Recent modeling advances link stellar evolution to observable remnants.

## Abstract

Supernovae shape the interstellar medium, chemically enrich their host galaxies, and generate powerful interstellar shocks that drive future generations of star formation. The shock produced by a supernova event acts as a type of time machine, probing the mass loss history of the progenitor system back to ages of $\sim$ 10 000 years before the explosion, whereas supernova remnants probe a much earlier stage of stellar evolution, interacting with material expelled during the progenitor's much earlier evolution. In this chapter we will review how observations of supernova remnants allow us to infer fundamental properties of the progenitor system. We will provide detailed examples of how bulk characteristics of a remnant, such as its chemical composition and dynamics, allow us to infer properties of the progenitor evolution. In the latter half of this chapter, we will show how this exercise may be extended from individual objects to SNR as classes of objects, and how there are clear bifurcations in the dynamics and spectral characteristics of core collapse and thermonuclear supernova remnants. We will finish the chapter by touching on recent advances in the modeling of massive stars, and the implications for observable properties of supernovae and their remnants.