Radio-continuum study of MCSNR J0536-7038 (DEM L249)

Abstract

We present a detailed radio-continuum study on Australia Telescope Compact Array (ATCA) observations of Large Magellanic Cloud (LMC) supernova remnant (SNR), MCSNR J0536-7038. This Type Ia SNR follows a horseshoe morphology, with a size 32 pc $\times$ 32 pc (1-pc uncertainty in each direction). It exhibits a radio spectrum $\alpha =-0.52\pm 0.07$ between $\lambda =73$ and 6 cm. We report detections of regions showing moderately high fractional polarisation at 6 cm, with a peak value of 71$\pm$25% and a mean fractional polarisation of 35$\pm$8%. We also estimate an average rotation measure across the remnant of -237 rad m${}^{-2}$. The intrinsic magnetic field appears to be uniformly distributed, extending in the direction of the two brightened limbs of the remnant.

Accepted for publication in Astrophysics and Space Science

References in corpus (3)

• Dense, Fe-rich Ejecta in Supernova Remnants DEM L238 and DEM L249: A New Class of Type Ia Supernova?
• Four new X-ray-selected supernova remnants in the Large Magellanic Cloud
• Far Ultraviolet Spectroscopic Explorer Survey of Magellanic Cloud Supernova Remnants

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• Two evolved supernova remnants with newly identified Fe-rich cores in the Large Magellanic Cloud
• Radio Emission from Interstellar Shocks: Young Type Ia Supernova Remnants and the Case of N 103B in the Large Magellanic Cloud