Abstract
We have discovered a giant radio halo in the massive merging cluster MACSJ0417.5-1154. This cluster, at a redshift of 0.443, is one of the most X-ray luminous galaxy cluster in the MAssive Cluster Survey (MACS) with an X-ray luminosity in the 0.1–2.4 keV band of 2.9×1045 erg s − 1. Recent observations from GMRT at 230 and 610 MHz have revealed a radio halo of ∼ 1.2 × 0.3 Mpc2 in extent. This halo is elongated along the North-West, similar to the morphology of the X-ray emission from Chandra. The 1400 MHz radio luminosity (L r) of the halo is ∼2 × 1025 W Hz − 1, in good agreement with the value expected from the L x − L r correlation for cluster halos.
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Dwarakanath, K.S., Malu, S. & Kale, R. Discovery of a Giant Radio Halo in a Massive Merging Cluster at z = 0.443. J Astrophys Astron 32, 529–532 (2011). https://doi.org/10.1007/s12036-011-9109-1
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DOI: https://doi.org/10.1007/s12036-011-9109-1