AGN physics - Constraints on blurred reflection in Mrk 509 from an XMM-Newton and INTEGRAL campaign
Abstract
Active Galactic Nuclei (AGNs), the most luminous persistent X-ray sources in the universe, are fed by accretion of matter onto the central supermassive black hole. An excess of X-ray emission below 1keV, called soft-excess, is present in the spectra of about 50% of the Seyfert 1s. The origin of this feature remains debated. This component has been explained originally by a blackbody, or by the presence of a cool (kT~0.1keV) Comptonizing region, but these models both present problems. The soft excess could alternatively be due to ionized reflection from the disk, blurred by the strong gravity of the black hole. In order to test this ionized reflection model, we used XMM-Newton and INTEGRAL data from the bright Seyfert 1 galaxy Mrk 509, for which we obtained ten long simultaneous observations every four days. We present here the results of the application of blurred reflection models on the ten Mrk 509 observations. We study the variation of the different parameters driving blurred reflection. From the evolution of these parameters, we assess the relevancy of blurred reflection models to explain the soft-excess in this object.
- Publication:
-
Half a Century of X-ray Astronomy
- Pub Date:
- September 2012
- Bibcode:
- 2012hcxa.confE.112B