Publication Date:
2013-06-09
Description:
We present a detailed study of Australia Telescope Compact Array observations of a newly discovered Large Magellanic Cloud supernova remnant (SNR), SNR J0533–7202. This object follows a horseshoe morphology, with a size of 37 pc x 28 pc (1 pc uncertainty in each direction). It exhibits a radio spectrum with the intrinsic synchrotron spectral index of α = –0.47 ± 0.06 between 73 and 6 cm. We report detections of regions showing moderately high fractional polarization at 6 cm, with a peak value of 36 ± 6 per cent and a mean fractional polarization of 12 ± 7 per cent. We also estimate an average rotation measure across the remnant of –591 rad m –2 . The current lack of deep X-ray observation precludes any conclusion about high-energy emission from the remnant. The association with an old stellar population favours a thermonuclear supernova origin of the remnant.
Print ISSN:
0035-8711
Electronic ISSN:
1365-2966
Topics:
Physics
Permalink