Reflection at large distance from the central engine in Seyferts

Abstract

We consider the possibility that most of the reflection component, observed in the hard X-ray spectra of Seyfert galaxies, could be formed on an extended medium, at large distance from the central source of primary radiation (e.g. on a torus). Then, the reflector cannot respond to the rapid fluctuations of the primary source. The observed reflected flux is controlled by the time-averaged primary spectrum rather than the instantaneous (observed) one. We show that this effect strongly influence the spectral fits parameters derived under the assumption of a reflection component consistent with the primary radiation. We find that a pivoting primary power-law spectrum with a nearly constant Comptonised luminosity may account for the reported correlation between the reflection amplitude $R$ and the spectral index $\Gamma$.

Proceeding of the meeting "X-ray emission from accretion onto black hole" 20-23 June 2001, Hopkins University, Baltimore, USA (style file jhuwkshp.sty included)

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• High-Resolution X-ray Spectroscopy and Modeling of the Absorbing and Emitting Outflow in NGC 3783
• X-ray spectra of accretion discs with dynamic coronae
• Testing Comptonization models using BeppoSAX observations of Seyfert 1 galaxies
• The BeppoSAX view of bright Compton-thin Seyfert 2 galaxies
• An XMM-Newton observation of the luminous Seyfert 1 galaxy Markarian 509
• The broad-band spectrum of 3C 120 observed by BeppoSAX
• The complex iron line of NGC 5506
• Long Term Spectral Variability of Seyfert Galaxies from RXTE Color-Flux Diagrams
• The BeppoSAX broad-band spectrum and variability of the Seyfert 1 NGC 3783
• The highly variable X-ray spectrum of the luminous Seyfert 1 galaxy 1H 0419-577
• The Effect of Changes in the ASCA Calibration on the Fe-Kalpha Lines in Active Galaxies
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Cited by in corpus (17)

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• A hard X-ray view of the soft excess in AGN
• The INTEGRAL Complete Sample of Type 1 AGN
• Anatomy of the AGN in NGC 5548: III. The high-energy view with NuSTAR and INTEGRAL
• A Long Look At MCG-5-23-16 With NuSTAR: I- Relativistic Reflection And Coronal Properties
• INTEGRAL and XMM-Newton Spectral Studies of NGC 4388
• High-energy monitoring of NGC 4593 with XMM-Newton and NuSTAR. X-ray spectral analysis
• Evolution of the X-ray spectrum in the flare model of Active Galactic Nuclei
• The broad-band XMM-Newton and INTEGRAL spectra of bright type 1 Seyfert galaxies
• The High Energy Spectrum of NGC 4151
• Full radiative coupling in two-phase models for accreting black holes
• NuSTAR hard X-ray spectra of radio galaxies
• Gravitational effects on the high energy emission of accreting black holes
• RXTE and BeppoSAX Observations of MCG -5-23-16: Reflection From Distant Cold Material
• The efficient low-mass Seyfert MCG-05-23-016