Presentation 1 : Poster
The intrinsic emission of Seyfert galaxies (PCHE)
Sandrine DELUIT
We present a study on the hard X-ray spectrum (above 15 keV) of different classes of Seyfert galaxies
observed
with BeppoSAX/PDS.
Using hard X-ray data, we avoid absorption effects modifying the Seyfert emission and we have directly access to
the central
engine of these sources.
The aim of this study is first to characterize the general properties of the hard X-ray
spectrum of Seyfert 1, 1.5 and 2 galaxies and secondly to compare their intrinsic emission
to test unified models according to which all the classes have the same nucleus.
We show differences of the intrinsic emission between Sy 1,
Sy 1.5 and Sy 2 galaxies. We are thus led to think that the unified model may not be sufficient to explain the differences between the classes of Seyfert galaxies.