It has been well established that galaxy clusters have magnetic fields. The exact properties and origin of these magnetic fields are still uncertain even though these fields play a key role in many astrophysical processes. Various attempts have been made to derive the magnetic field strength and structure of nearby galaxy clusters using Faraday rotation of extended cluster radio sources. This approach needs to make various assumptions that could be circumvented when using background radio sources. However, because the number of polarised radio sources behind clusters is low, at the moment such a study can only be done statistically. In this paper, we investigate the depolarisation of radio sources inside and behind clusters in a sample of 124 massive clusters at z0.2R_500_ region. In the core region, we did not observe enough sources to detect a significant difference between cool-core and non-cool-core clusters. Our findings show that the statistical depolarisation of radio sources is a good probe of cluster magnetic field parameters. Cluster members can be used for this purpose as well as background sources because the local interaction between the radio galaxies and the intracluster medium does not strongly affect the observed depolarisation trend.

Cone search capability for table J/A+A/665/A71/tablec1 (Polarised source catalogue)

Cone search capability for table J/A+A/665/A71/tabled1 (Full source catalogue (unpolarised))

Cone search capability for table J/A+A/665/A71/tablee1 (Cluster catalogue)