AGN Unification through Scattering in High Redshift Radio Galaxies

S. di Serego Alighieri

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Recent developments on the detection of the 2200 A feature in radio galaxies at z~2.5 will be presented, together with an analysis of spectropolarimetric data to understand the contribution to the feature by dust absorption and scattering. These results will be discussed in the framework of unification between powerful radio galaxies and radio loud quasars.