TY - JOUR
T1 - Multifrequency study of the Large Magellanic Cloud supernova remnant (SNR) B0513-692 and new SNR candidate J051327-6911
AU - Bojičić, I. S.
AU - Filipović, M. D.
AU - Parker, Q. A.
AU - Payne, J. L.
AU - Jones, P. A.
AU - Reid, W.
AU - Kawamura, A.
AU - Fukui, Y.
PY - 2007/7
Y1 - 2007/7
N2 - We present a new multiwavelength study of supernova remnant (SNR) B0513-692 in the Large Magellanic Cloud (LMC). The remnant also has a strong, superposed, essentially unresolved, but unrelated radio source at its north-western edge, J051324-691049. This is identified as a likely compact H ii region based on related optical imaging and spectroscopy. We use the Australia Telescope Compact Array (ATCA) at 4790 and 8640 MHz (λ ≃ 6 cm and λ ≃ 3.5 cm) to determine the large-scale morphology, spectral index and polarization characteristics of B0513-692 for the first time. We detect a strongly polarized region (49 per cent) in the remnant's southern edge (λ ≃ 6 cm). Interestingly, we also detect a small (∼40 arcsec) moderately bright, but distinct optical, circular shell in our Hα imagery which is adjacent to the compact H ii region and just within the borders of the north-eastern edge of B0513-692. We suggest that this is a separate new SNR candidate based on its apparently distinct character in terms of optical morphology in three imaged emission lines and indicative SNR optical spectroscopy (including enhanced optical [S ii] emission relative to Hα).
AB - We present a new multiwavelength study of supernova remnant (SNR) B0513-692 in the Large Magellanic Cloud (LMC). The remnant also has a strong, superposed, essentially unresolved, but unrelated radio source at its north-western edge, J051324-691049. This is identified as a likely compact H ii region based on related optical imaging and spectroscopy. We use the Australia Telescope Compact Array (ATCA) at 4790 and 8640 MHz (λ ≃ 6 cm and λ ≃ 3.5 cm) to determine the large-scale morphology, spectral index and polarization characteristics of B0513-692 for the first time. We detect a strongly polarized region (49 per cent) in the remnant's southern edge (λ ≃ 6 cm). Interestingly, we also detect a small (∼40 arcsec) moderately bright, but distinct optical, circular shell in our Hα imagery which is adjacent to the compact H ii region and just within the borders of the north-eastern edge of B0513-692. We suggest that this is a separate new SNR candidate based on its apparently distinct character in terms of optical morphology in three imaged emission lines and indicative SNR optical spectroscopy (including enhanced optical [S ii] emission relative to Hα).
UR - http://www.scopus.com/inward/record.url?scp=34547238482&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2007.11784.x
DO - 10.1111/j.1365-2966.2007.11784.x
M3 - Article
AN - SCOPUS:34547238482
VL - 378
SP - 1237
EP - 1247
JO - Monthly Notices of the Royal Astronomical Society: Letters
JF - Monthly Notices of the Royal Astronomical Society: Letters
SN - 1745-3925
IS - 4
ER -