Complex diffuse emission in the cluster PLCK~G004.5-19.5
arXiv:1708.00789 · doi:10.1051/0004-6361/201730496
Abstract
We present radio observations of the galaxy cluster PLCK G004.5-19.5 () using the Giant Metrewave Radio Telescope at 150~MHz, 325~MHz, and 610~MHz. We find an unusual arrangement of diffuse radio emission in the center and periphery of the cluster, as well as several radio galaxies with head-tail emission. A patch of peripheral emission resembles a radio relic, and central emission resembles a radio halo. Reanalysis of archival XMM-Newton X-ray data shows that PLCK G004.5-19.5 is disturbed, which has a known correlation with the existence of radio relics and halos. Given that the number of known radio halos and radio relics at is very limited, PLCK G004.5-19.5 is an important addition to understanding merger-related particle acceleration at higher redshifts.
7 pages, 7 figures, accepted at A&A with reference AA/2017/30496
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