G332.5-5.6, a new Galactic supernova remnant

Details G332.5-5.6, a new Galactic supernova remnant G332.5-5.6, a new Galactic supernova remnant

2006-11-07

arxiv.org/abs/astro-ph/0611234v1

Mon.Not.Roy.Astron.Soc.375:92-98,2007

Astronomy and Astrophysics

Astrophysics

Accepted for publication in Monthly Notices of the Royal Astronomical Society

Scientific paper

10.1111/j.1365-2966.2006.11264.x

We present radio observations of the source G332.5-5.6, a candidate supernova remnant (SNR). Observations have been performed with the Australia Telescope Compact Array (ATCA) at two frequencies, at 1.4 and 2.4 GHz. Our results confirm that G332.5-5.6 is an SNR, with a spectral index equal to -0.7 +/- 0.2 for the whole source and an average fractional polarization of ~35% at 2.4 GHz. The central component is coincident with extended X-ray emission and the distance to the SNR is estimated to be ~3.4 kpc. Based on its radio and X-ray morphology, this SNR should be classified as a composite, and we suggest that it belongs to a trident-shaped subclass like G291.0-0.1.

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