Abstract

BOZZETTO, L. M. et al. Radio continuum observations of LMC SNR J0550-6823. Rev. mex. astron. astrofis [online]. 2012, vol.48, n.1, pp.41-46. ISSN 0185-1101.

We report on new Australia Telescope Compact Array (ATCA) observations of the Large Magellanic Cloud (LMC) supernova remnant (SNR) J0550-6823 (DEM L328). This object is a typical horseshoe SNR with a diameter of 373" × 282" ± 4" (90 × 68 ± 1 pc), making it one of the largest known SNRs in the Local Group. We estimate a relatively steep radio spectral index of α = -0.79 ± 0.27. However, its stronger than expected polarisation of 50% ± 10% is atypical for older and more evolved SNRs. We also note a strong correlation between [O III] and radio images, classifying this SNR as oxygen dominant.

Keywords : ISM [individual objects (DEM L328, SNR J0550-6823)]; ISM [supernova remnants]; Magellanic Clouds.