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Multifrequency radio observations of a SNR in the LMC: The case of SNR J0527-6549 (DEM l204)

Bozzetto L.M.
Filipović M.D.
Crawford E.J.
Bojičić I.S.
Payne J.L.
Mendik A.
Wardlaw B.
de Horta A.Y.

We present a detailed study and results of new Australia Telescope Compact Array (ATCA) observations of supernova remnant SNR J0527-6549. This Large Magellanic Cloud (LMC) object follows a typical supernova remnant (SNR) horseshoe morphology with a diameter of D=(66×58)±1 pc which is among the largest SNRs in the LMC. Its relatively large size indicates older age while a steeper than expected radio spectral index of αあるふぁ=-0.92±0.11 is more typical of younger and energetic SNRs. Also, we report detections of regions with a high order of polarization at a peak value of ~54%±17% at 6 cm.

Keywords: ISM: supernova remnants, Magellanic Clouds, Radio Continuum: ISM, Polarization, ISM: individual objects: SNR J0527-6549