The high resolution X-ray spectrum of SNR 0506-68 using XMM-Newton

TL;DR

This study uses XMM-Newton's high-resolution spectra to analyze the ionisation state, elemental abundances, and age of supernova remnant SNR 0506-68, revealing signs of recombination and over-ionisation.

Contribution

First detailed spectral analysis of SNR 0506-68 using XMM-Newton data to determine ionisation, composition, and age, highlighting over-ionisation phenomena.

Findings

Signs of recombination in the spectrum

Remnant is over-ionised and cools rapidly

Estimated age is around 4000 years

Abstract

Aims: We study the supernova remnant 0506-68 in order to obtain detailed information about, among other things, the ionisation state and age of the ionised plasma. Methods: Using the Reflection Grating Spectrometer (RGS) onboard the XMM-Newton satellite we are able to take detailed spectra of the remnant. In addition, we use the MOS data to obtain spectral information at higher energies. Results: The spectrum shows signs of recombination and we derive the conditions for which the remnant and SNR in general are able to cool rapidly enough to become over-ionised. The elemental abundances found are mostly in agreement with the mean LMC abundances. Our models and calculations favour the lower age estimate mentioned in the literature of $\sim4000$ year.