| Abstract: | Polarized radio emission is detected at various scales in the Universe. In this document, I will briefly review our knowledge
on polarized radio sources in galaxy clusters and at their outskirts, emphasizing the crucial information provided by the
polarized signal on the origin and evolution of such sources. Successively, I will focus on Abell 2255, which is known in
the literature as the first cluster for which filamentary polarized emission associated with the radio halo has been detected.
By using RM synthesis on our multi-wavelength WSRT observations, we studied the 3-dimensional geometry of the cluster, unveiling
the nature of the polarized filaments at the borders of the central radio halo. Our analysis points out that these structures
are relics lying at large distance from the cluster center. |
