| 29th of August 2018 |
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| ATCA and MWA observations of the Torpedo cluster |
| by Zheng et al. |
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The Torpedo cluster, SPT-CL J0245–5302, is a massive, merging cluster
at a redshift of z = 0.300, with a classic bow shock in the cluster’s
intra-cluster medium revealed by Chandra X-ray observations. Zheng et
al. have combined Australia Telescope Compact Array 2.1 GHz data with
Murchison Widefield Array 72--231 MHz data to study the properties of
the cluster. They characterize a number of discrete and diffuse radio
sources in the cluster, including two previously unknown radio relics
on the cluster periphery. The Torpedo cluster is a double relic system
at moderate redshift.
The image above shows the Chandra soft-band X-ray images of the cluster overlaid with the contours of the 200 MHz MWA image in green and the contours of the ATCA image at 2868 MHz in white. The yellow circle at the bottom right shows the ATCA synthesized beam. More details are given in the paper, published in Monthly Notices of the Royal Astronomical Society.
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