Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-11-18
Astronomy and Astrophysics
Astrophysics
4 pages, to appear in proceedings of: "Active Galactic Nuclei: from Central Engine to Host Galaxy," Meudon, July 2002 meeting;
Scientific paper
XMM-Newton observations of type I AGN are presented. The properties of the iron K emission line are reviewed, the majority of AGN observed by XMM-Newton show narrow, unresolved (by XMM) iron lines at 6.4 keV from cold matter that must originate far from the inner accretion disc, perhaps in the putative torus or outer broad line region. The strength of this narrow line appears to decrease with luminosity, implying a reduction in the covering fraction of this material in the more luminous quasars. Few examples of the broad, relativistic iron line profile have been found by XMM-Newton, although in MCG -6-30-15, the extreme breadth of the broad line component may imply a Kerr metric for the central black hole. Generally, relativistic Fe K line profiles are not required in a number of other Seyfert 1 X-ray spectra.
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