Diffuse radio emission in MACS J1752.0+4440

Abstract

We report the discovery of large-scale diffuse radio emission in the galaxy cluster MACS J1752.0+4440 (z=0.366). Using Westerbork Synthesis Radio Telescope (WSRT) observations we find that the cluster hosts a double radio relic system as well as a 1.65 Mpc radio halo covering the region between the two relics. The relics are diametrically located on opposite sides of the cluster center. The NE and SW relics have sizes of 1.3 and 0.9 Mpc, respectively. In case of an isolated binary merger event, the relative sizes of the relics suggest a mass ratio about 2:1. We measure integrated spectra of -1.16 \pm 0.03 for the NE and -1.10 \pm 0.05 for the SW relic. We conclude that this cluster has undergone a violent binary merger event and the relics are best explained by particles (re)accelerated in outwards traveling shock waves. The spectral indices suggest the relics trace shock waves with Mach numbers (M) of around 3.5 to 4.5. These relatively high Mach numbers derived from the radio spectral index are comparable to those derived for a few other recently discovered relics. This implies that merger shocks with M > 3 are relatively common in cluster outskirts if our understanding of diffusive shock acceleration is correct.

6 pages, 3 figures, accepted for publication in MNRAS

References in corpus (13)

• Clusters of galaxies : observational properties of the diffuse radio emission
• Particle Acceleration on Megaparsec Scales in a Merging Galaxy Cluster
• On the connection between giant radio halos and cluster mergers
• A low-frequency radio halo associated with a cluster of galaxies
• Radio signature of cosmological structure formation shocks
• Statistics of Giant Radio Halos from Electron Reacceleration Models
• Cosmic rays and Radio Halos in galaxy clusters : new constraints from radio observations
• Shock acceleration as origin of the radio relic in A521?
• New scaling relations in cluster radio halos and the re-acceleration model
• First LOFAR observations at very low frequencies of cluster-scale non-thermal emission: the case of Abell 2256
• The spatial distribution of galaxies of different spectral types in the massive intermediate-redshift cluster MACSJ0717.5+3745
• An X-ray/optical study of the complex dynamics of the core of the massive intermediate-redshift cluster MACSJ0717.5+3745
• Probing the Large-Scale Structure Around the Most Distant Galaxy Clusters from the Massive Cluster Survey

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