Speaker
Description
Diffuse radio emission in galaxy clusters is the best evidence for the presence of accelerated particles and magnetic fields on large scales. Current low-frequency surveys, such as LoTSS, are revealing a large number of spectacular radio sources, but detailed analysis on the radio properties is limited to the low-redshift and high-mass regime. At high redshift, the relatively short ages of the large-scale structures and the strong energy losses due to inverse Compton should prevent the observations of cluster-scale diffuse radio emission. However, recent LOFAR observations showed that is possible to detect these sources, at least those host by the most-massive clusters.
In this talk, I will present the state-of-art of the investigation of diffuse radio emission at z~1 in clusters selected from the Massive and Distant Clusters of Wise Survey (MaDCoWS) sample. Moreover, I will show the first study of the most distant relic discovered so far in the Northern Sky at ~arcsecond resolutions, as seen as from the LOFAR HBA International Telescope (ILT).
