The XMM-Newton bright survey: Cosmologlcal properties of the active galactic nuclei population

摘要

Using the XMM-Newton hard bright serendipitous sample we derive the X-ray luminosity functions of absorbed and unabsorbed AGN and the fraction of absorbed AGN as a function of Lx Absorbed AGN are described by a steeper XLF with respect to unabsorbed ones, implying a decreasing fraction of absorbed AGN for increasing Lx This behaviour is in excellent agreement with the predictions of the recently proposed radiation-lvmited clumpy dusty torus model.