Radio-Continuum Observations Of Small, Radially Polarised Supernova Remnant J0519-6902 In The Large Magellanic Cloud

TL;DR

This paper presents radio continuum observations of the small, young supernova remnant J0519-6902 in the Large Magellanic Cloud, revealing its spectral properties, magnetic field, and polarization characteristics.

Contribution

It provides new detailed radio observations of SNR J0519-6902, including spectral index, polarization, and magnetic field estimates, enhancing understanding of young Type Ia supernova remnants.

Findings

Spectral index of -0.53 ± 0.07.

Radial polarization at 3 & 6 cm wavelengths.

Magnetic field estimated at ~171 microG.

Abstract

We report on new Australian Telescope Compact Array (ATCA) observations of SNR J0519-6902. The Supernova Remnant (SNR) is small in size (~8 pc) and exhibits a typical SNR spectrum of alpha = -0.53 +- 0.07, with steeper spectral indices found towards the northern limb of the remnant. SNR J0519-6902 contains a low level of radially orientated polarisation at wavelengths of 3 & 6 cm, which is characteristic of younger SNRs. A fairly strong magnetic field was estimated of ~171 microG. The remnant appears to be the result of a typical Type Ia supernovae, sharing many properties as another small and young Type Ia LMC SNR, J0509-6731.