Abstract
Abstract We study the hard X-ray emission of two subsamples of Seyfert 2 galaxies with and without Polarized Broad Lines (PBL hereafter). In the hard X-ray domain, absorption effects do not significantly modify the intrinsic emission allowing us a direct access to the central engine. The purpose of this study is to compare the primary emission of these two subclasses in order to investigate the nature of their central engine and to test unified models according to which they both have a hidden Sy 1 nucleus. We compute the average hard X-ray spectra of Seyfert 2 galaxies with and without PBL observed with BeppoSAX/PDS (15-136 keV). The two spectra have a common general behavior at first sight but investigating deeper we find differences in the intrinsic properties of the two categories of Seyfert 2 galaxies. Sy 2 with PBL have physical conditions close to that of Sy 1 galaxies whereas Sy 2 without PBL differ substantially, suggesting that they may have a particular place in the scheme of Seyfert galaxies.
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