Radio-continuum study of Large Magellanic Cloud supernova remnant J0509-6731

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1093/mnras/stu499
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Name affiliation
  1. National Research Council of Canada. National Science Infrastructure
FormatText, Article
Journal titleMonthly Notices of the Royal Astronomical Society
ISSN0035-8711
1365-2966
Volume440
Issue4
Pages3220–3225
SubjectPolarization; Supernova remnants; Magellanic Clouds; Radio continuum
Abstract
We present a detailed study of Australia Telescope Compact Array observations (λ = 20, 13, 6 and 3 cm) of supernova remnant (SNR) J0509−6731 in the Large Magellanic Cloud. The remnant has a ring morphology with brightened regions towards the south-western limb. We also find a second brightened inner ring which is only seen in the radio continuum. The SNR is almost circular, with a diameter ranging from 7 to 8 pc, and a steep radio spectral index between 36 and 3 cm of α = −0.73 ± 0.02, which is characteristic of younger SNRs. We also report detection of radially orientated polarization across the remnant at 6 cm, with a mean fractional polarization level of P ≅ (26 ± 13) per cent. We find the magnetic field (∼168 μG) and Σ–D (Σ = 1.1 × 10⁻¹⁹ W m⁻² Hz⁻¹ sr⁻¹, D = 7.35 pc) to be consistent with other young remnants.
Publication date
PublisherBlackwell Publishing Ltd
LanguageEnglish
Peer reviewedYes
NPARC number23000592
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