# MUSE Integral Field Observations of the Oxygen-rich SNR 1E 0102.2-7219

## TL;DR

This study uses advanced integral field spectroscopy to uncover new elements and dynamics in the oxygen-rich supernova remnant 1E 0102.2-7219, challenging previous progenitor models and revealing complex shock and nucleosynthesis features.

## Contribution

It presents the first detection of sulfur-rich ejecta and fast-moving hydrogen in the remnant, providing new insights into its explosion mechanism and progenitor star.

## Key findings

- Detection of sulfur-rich ejecta
- Discovery of fast-moving hydrogen knots
- Observation of shock-related [Fe xiv] and [Fe xi] emission lines

## Abstract

We have observed the oxygen-rich SNR 1E 0102.2-7219 with the integral field spectrograph WiFeS at Siding Spring Observatory and discovered sulfur-rich ejecta for the first time. Follow-up deep DDT observations with MUSE on the VLT (8100 s on source) have led to the additional discovery of fast- moving hydrogen as well as argon-rich and chlorine-rich material. The detection of fast-moving hydrogen knots challenges the interpretation that the progenitor of 1E 0102 was a compact core of a Wolf-Rayet star that had shed its entire envelope. In addition to the detection of hydrogen and the products of oxygen-burning, this unprecedented sharp (0.2" spaxel size at ~0.7" seeing) and deep MUSE view of an oxygen-rich SNR in the Magellanic Clouds reveals further exciting discoveries, including [Fe xiv]{\lambda}5303 and [Fe xi]{\lambda}7892 emission, which we associate with the forward shock. We present this exciting data set and discuss some of its implications for the explosion mechanism and nucleosynthesis of the associated supernova.