The XMM-Newton view of the relativistic spectral features in AX J0447-0627

The XMM-Newton observation of the optically type 1 active galactic nucleus (AGN) AX J0447-0627 (z = 0.214) unambiguously reveals a complex, bright, and prominent set of lines in the 4-8 keV rest-frame energy range. Although from a phenomenological point of view, the observed properties can be described by a simple power-law model plus five narrow Gaussian lines (at rest-frame energies of similar to 4.49, similar to 5.55, similar to 6.39, similar to 7.02, and similar to 7.85 keV), we find that a model comprising a power law (Gamma similar to 2.2), a reflected relativistic continuum, a narrow Fe I K alpha line from neutral material, as well as a broad Fe K alpha relativistic line from a ionized accretion disk, represents a good physical description of the data. The "double-horned'' profile of the relativistic line implies an inclination of the accretion disk of similar to 45 degrees and an origin in a narrow region of the disk, from R-in similar to 19GM/c(2) to R-out similar to 30GM/c(2). The narrow Fe I K alpha line from neutral material is probably produced far from the central black hole, most likely in the putative molecular torus. Although some of these properties have already been found in other type 1 AGNs and discussed in the literature, at odds with the objects reported so far we measure high equivalent widths of the observed lines: similar to 1.4 keV for the double-horned relativistic line and similar to 0.4 keV for the narrow line.