A new radio continuum study of the large magellanic cloud supernova remnant MC SNR J0519–6902
Résumé
We present a new radio continuum study of the Large Magellanic Cloud supernova remnant (SNR) MC SNR J0519-6902. With a diameter of ∼8 pc, this SNR shows a radio ring-like morphology with three bright regions towards the north, east, and south. Its linear polarisation is prominent with average values of 5 ± 1% and 6 ± 1% at 5 500 and 9 000 MHz, and we find a spectral index of -0.62 ± 0.02, typical of a young SNR. The average rotation measure is estimated at -124 ± 83 rad m -2 and the magnetic field strength at ∼ 11 μG. We also estimate an equipartition magnetic field of 72 ± 5 μG and minimum explosion energy of E min = 2.6×10 48 erg. Finally, we identified an H I cloud that may be associated with MC SNR J0519-6902, located in the southeastern part of the remnant, along with a potential wind-bubble cavity.
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