The Large Scale Structure: Polarization Aspects

Details The Large Scale Structure: Polarization Aspects The Large Scale Structure: Polarization Aspects

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011japa...32..567p&link_type=abstract

Journal of Astrophysics and Astronomy, Vol. 32, p. 567-576

Astronomy and Astrophysics

Astrophysics

Galaxies, Clusters, General: Galaxies, Clusters, Individual (Abell 2255), Galaxies, Intergalactic Medium, Magnetic Fields, Polarization

Scientific paper

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.

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