Multifrequency study of the Large Magellanic Cloud supernova remnant J0529−6653 near pulsar B0529-66

Abstract

We report the Australia Telescope Compact Array (ATCA) and ROSAT detection of supernova remnant (SNR) J0529−6653 in the Large Magellanic Cloud (LMC) which is positioned in the projected vicinity of the known radio pulsar PSR B0529−66. In the radio continuum frequencies, this LMC object follows a typical SNR structure of a shell morphology with brightened regions in the south‐west. It exhibits an almost circular shape of D= 33 × 31 pc (1‐pc uncertainty in each direction) and radio spectral index of α=−0.68 ± 0.03 – typical for mid‐age SNRs. We also report detection of polarized regions with a peak value of ∼17 ± 7 per cent at 6 cm. An investigation of ROSAT images produced from merged Position Sensitive Proportional Counter (PSPC) data reveals the presence of extended X‐ray emission coincident with the radio emission of the SNR. In X‐rays, the brightest part is in the north‐east. We discuss various scenarios with regard to the SNR–pulsar association with emphasis on the large age difference, lack of a pulsar trail and no prominent point‐like radio or X‐ray source.

Multifrequency study of SNR J0533−7202, a new supernova remnant in the LMC

“…Our estimated peak value is 36±6% with a mean fractional polarisation of 12±7%. This level of fractional polarisation is relatively high when compared to various other SNRs in the LMC (Cajko et al 2009;Crawford et al 2010;Bozzetto et al 2012a) and would be (theoretically) expected for an SNR with a radio spectrum of around or less than -0.5 (Rolfs & Wilson 2003). This may indicate varied dynamics along the shell.…”

Variability of the Pulsed Radio Emission From the Large Magellanic Cloud Pulsar PSR J0529–6652

“…There is also no evidence of any association with a high-energy emission mechanism for PSR J0529−6652, which is thought to be a feature of classical giant pulses (Johnston & Romani 2004). We checked this with a high-resolution XMM-Newton map of the region (M. Filipović 2012, private communication; see also Bozzetto et al 2012) and by folding Fermi Large Area Telescope data using the pulsar's ephemeris to look for gamma-ray pulsations. No emission was detected from the pulsar in either case.…”

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

“…The miriad 2 (Sault, Teuben, & Wright 1995) and karma 3 (Gooch 1995) software packages were used for reduction and analysis. More information on the observing procedure and other sources observed in this project can be found in Bozzetto et al (2012a,b,c,d, 2013) and De Horta et al (2012.…”