Poster Title: Why only high-redshift obscured AGN are bright submm sources?
Abstract: In our sample of matched X-ray absorbed and unabsorbed AGN, strong submm emission associated to star formation is found only in the high redshift X-ray absorbed sample, ruling out orientation effects as the cause of the absorption. These objects are probably undergoing a transition between a hidden growth phase and an unabsorbed AGN phase. SCUBA submm imaging reveals a ~400kpc long chain of galaxies around at least one of our AGN, and probably associated with it. These galaxies present strong obscured star formation, which could be associated with mergers or encounters within the filament.
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