# Bridging the gap between supernovae and their remnants through multi-dimensional hydrodynamic modeling

## TL;DR

This paper demonstrates how advanced multi-dimensional hydrodynamic models effectively connect supernova explosions to their remnants, aiding in understanding the ejecta structure and circumstellar environment through detailed simulations.

## Contribution

It introduces and applies multi-dimensional hydrodynamic modeling to bridge supernovae and remnants, revealing ejecta structures and progenitor environment details.

## Key findings

- Models successfully interpret observations of Cassiopeia A and SN 1987A.
- Revealed 3D ejecta structures and circumstellar environment features.
- Constrained progenitor supernova properties through simulations.

## Abstract

Supernova remnants (SNRs) are diffuse extended sources characterized by a complex morphology and a non-uniform distribution of ejecta. Such a morphology reflects pristine structures and features of the progenitor supernova (SN) and the early interaction of the SN blast wave with the inhomogeneous circumstellar medium (CSM). Deciphering the observations of SNRs might open the possibility to investigate the physical properties of both the interacting ejecta and the shocked CSM. This requires accurate numerical models which describe the evolution from the SN explosion to the remnant development and which connect the emission properties of the remnants to the progenitor SNe. Here we show how multi-dimensional SN-SNR hydrodynamic models have been very effective in deciphering observations of SNR Cassiopeia A and SN 1987A, thus unveiling the structure of ejecta in the immediate aftermath of the SN explosion and constraining the 3D pre-supernova structure and geometry of the environment surrounding the progenitor SN.