Radio Halo and Relic Sources in Galaxy Clusters

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Radio sources in galaxy clusters can be roughly classified into halo and relic sources. The emission from these sources are believed to be triggered by clusters-merging induced activities such as shocks and turbulences which accelerate electrons directly and/or re-accelerate fossil electrons in the intracluster media to relativistic speeds. We investigate the spectral and polarization properties of emission from cluster halo and relic radio sources via time-dependent polarized radiative transfer calculations which take account of propagation effects of inhomogeneities in the intracluster material and magnetic field and effects of source geometry and non-negligible light crossing time. The implication of the results on theoretical modeling and interpretation of the observations of cluster radio sources are discussed.

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