Double radio relic and odd radio circle discovered with MeerKAT arxiv
We present the serendipitous discovery of a large double radio relic associated with the merging galaxy cluster PSZ2 G277.93+12.34 and a new odd radio circle, ORC J1027-4422, both found in deep MeerKAT 1.3 GHz wide-band data. The angular separation of the two arc-shaped cluster relics is 16 arcmin or 2.6 Mpc for a cluster redshift of z=0.158. The thin southern relic, which shows a number of ridges/shocks including one possibly moving inwards, has a linear extent of 1.64 Mpc.
Complementary SRG/eROSITA X-ray images reveal extended emission from hot intracluster gas between the two relics and around the narrow-angle tail radio galaxy PMN J1033-4335 located just east of the northern relic. No radio halo associated with the PSZ2 cluster is detected. The radio morphologies of the NAT galaxy and the northern relic, which are also detected with the Australian Square Kilometer Array Pathfinder at 887.5 MHz, suggest both are moving in the same outward direction.
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