Candidate radio supernova remnants observed by the GLEAM survey over $345^\circ < l < 60^\circ$ and $180^\circ < l < 240^\circ$

TL;DR

This study uses GLEAM survey data to confirm, reclassify, and analyze candidate supernova remnants in the Galactic plane, providing new identifications and insights into their spectral and morphological properties.

Contribution

The paper presents the first systematic confirmation and reclassification of SNR candidates using GLEAM survey data, expanding the known SNR catalog and refining candidate classifications.

Findings

Confirmed 10 SNRs from 101 candidates

Reclassified 5 candidates as Hii regions

Confirmed 3 SNRs from MAGPIS candidates

Abstract

We examined the latest data release from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey covering $345^\circ < l < 60^\circ$, $180^\circ < l < 240^\circ$, using these data and that of the Widefield Infrared Survey Explorer to follow up proposed candidate Supernova Remnants from other sources. Of the 101 candidates proposed in the region, we are able to definitively confirm ten as SNRs, tentatively confirm two as SNRs, and reclassify five as Hii regions. A further two are detectable in our images but difficult to classify; the remaining 82 are undetectable in these data. We also investigated the 18 unclassified Multi-Array Galactic Plane Imaging Survey (MAGPIS) candidate SNRs, newly confirming three as SNRs, reclassifying two as Hii regions, and exploring the unusual spectra and morphology of two others.