Probing the properties of extragalactic Supernova Remnants

TL;DR

This paper reviews recent advances in extragalactic Supernova Remnant surveys across optical, radio, and X-ray bands, highlighting how multi-wavelength data improve understanding of SNR properties and evolution in diverse environments.

Contribution

It provides a comprehensive overview of multi-wavelength extragalactic SNR surveys, emphasizing new insights into their physical properties and evolutionary processes across different galaxy types.

Findings

Multi-wavelength surveys reveal key physical parameters of SNRs.

SNR properties correlate with star formation activity.

Luminosity distributions depend on galaxy types.

Abstract

The investigation of extragalactic Supernova Remnants (SNRs) gives us the advantage of surmounting the challenges we are usually confronted with when observing Galactic SNRs, most notably Galactic extinction and distance uncertainties. At the same time, by obtaining larger samples of SNRs, we are allowed to cover a wider range of environments and Interstellar Medium (ISM) parameters than our Galaxy, providing us a more complete and representative picture of SNR populations. I will outline the recent progress on extragalactic surveys of SNR populations focusing on the optical, radio, and X-ray bands. Multi-wavelength surveys can provide several key aspects of the physical processes taking place during the evolution of SNRs while at the same time can overcome possible selection effects that are inherent from monochromatic surveys. I will discuss the properties derived in each band (e.g. line ratios, luminosities, denisties, temperatures) and their connection in order to yield information on various aspects of their behaviour and evolution. For example their interplay with the surrounding medium, their correlation with star formation activity, their luminosity distributions and their dependence on galaxy types.