Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 447, Issue 2, Pages 1895-1910Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu2591
Keywords
magnetic fields; polarization; galaxies: clusters: individual: Abell 3667; radio continuum: general
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Funding
- UK Science & Technology Facilities Council (STFC)
- SKA SA
- European Research Council [ERC-2012-StG-307215 LODESTONE]
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Abell 3667 is among the most well-studied galaxy clusters in the Southern hemisphere. It is known to host two giant radio relics and a head-tail radio galaxy as the brightest cluster galaxy. Recent work has suggested the additional presence of a bridge of diffuse synchrotron emission connecting the north-western radio relic with the cluster centre. In this work, we present full-polarization observations of Abell 3667 conducted with the Karoo Array Telescope at 1.33 and 1.82 GHz. Our results show both radio relics as well as the brightest cluster galaxy. We use ancillary higher resolution data to subtract the emission from this galaxy, revealing a localised excess, which we tentatively identify as a radio mini-halo. This mini-halo candidate has an integrated flux density of 67.2 +/- 4.9 mJy beam(-1) at 1.37 GHz, corresponding to a radio power of P-1.4GHz = 4.28 +/- 0.31 x 10(23) W Hz(-1), consistent with established trends in mini-halo power scaling.
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