Multifrequency study of SNR J0533-7202, a new supernova remnant in the LMC
Abstract
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 × 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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- July 2013
- DOI:
- 10.1093/mnras/stt568
- arXiv:
- arXiv:1304.0495
- Bibcode:
- 2013MNRAS.432.2177B
- Keywords:
-
- polarization;
- ISM: supernova remnants;
- Magellanic Clouds;
- radio continuum: ISM;
- X-rays: ISM;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 6 pages, 5 figures accepted to Monthly Notices of the Royal Astronomical Society