Modelling the Extreme X-ray Spectrum of IRAS 13224-3809

Abstract

The extreme NLS1 galaxy IRAS 13224-3809 shows significant variability, frequency depended time lags, and strong Fe K line and Fe L features in the long 2011 XMM-Newton observation. In this work we study the spectral properties of IRAS 13224-3809 in detail, and carry out a series of analyses to probe the nature of the source, focusing in particular on the spectral variability exhibited. The RGS spectrum shows no obvious signatures of absorption by partially ionised material (warm absorbers). We fit the 0.3-10.0 keV spectra with a model that includes relativistic reflection from the inner accretion disc, a standard powerlaw AGN continuum, and a low-temperature (~0.1 keV) blackbody, which may originate in the accretion disc, either as direct or reprocessed thermal emission. We find that the reflection model explains the time-averaged spectrum well, and we also undertake flux-resolved and time-resolved spectral analyses, which provide evidence of gravitational light-bending effects. Additionally, the temperature and flux of the blackbody component are found to follow the $L\propto T^4$ relation expected for simple thermal blackbody emission from a constant emitting area, indicating a physical origin for this component.

12 pages, 7 figures, accepted for publication in MNRAS

References in corpus (7)

• X-ray Properties of Black-Hole Binaries
• Modelling the behaviour of accretion flows in X-ray binaries
• Investigating the nature of narrow-line Seyfert 1 galaxies with high-energy spectral complexity
• The broad band spectral variability of MCG-6-30-15 observed by NuSTAR and XMM-Newton
• Energy-dependent variability and the origin of the soft X-ray excess in AGN
• The impact of accretion disk winds on the X-ray spectrum of AGN: Part 1 - XSCORT
• Reflection From the Strong Gravity Regime in a z=0.658 Gravitationally Lensed-Quasar

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