Suzaku Observations of Iron Lines and Reflection in AGN

Abstract

Initial results on the iron K-shell line and reflection component in several AGN observed as part of the Suzaku Guaranteed time program are reviewed. This paper discusses a small sample of Compton-thin Seyferts observed to date with Suzaku; namely MCG -5-23-16, MCG -6-30-15, NGC 4051, NGC 3516, NGC 2110, 3C 120 and NGC 2992. The broad iron K$\alpha$ emission line appears to be present in all but one of these Seyfert galaxies, while the narrow core of the line from distant matter is ubiquitous in all the observations. The iron line in MCG -6-30-15 shows the most extreme relativistic blurring of all the objects, the red-wing of the line requires the inner accretion disk to extend inwards to within 2.2Rg of the black hole, in agreement with the XMM-Newton observations. Strong excess emission in the Hard X-ray Detector (HXD) above 10 keV is observed in many of these Seyfert galaxies, consistent with the presence of a reflection component from reprocessing in Compton-thick matter (e.g. the accretion disk). Only one Seyfert galaxy (NGC 2110) shows neither a broad iron line nor a reflection component. The spectral variability of MCG -6-30-15, MCG -5-23-16 and NGC 4051 is also discussed. In all 3 cases, the spectra appear harder when the source is fainter, while there is little variability of the iron line or reflection component with source flux. This agrees with a simple two component spectral model, whereby the variable emission is the primary power-law, while the iron line and reflection component remain relatively constant.

arXiv comment8 pages. Accepted for publication in Astronomical Notes (proceedings of invited talk given at "Variable and Broad Iron lines around Black Holes", ESAC, Madrid, Spain, 26-28 June 2006)

References in corpus (26)

• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• A Structure for Quasars
• ASCA observations of Seyfert 1 galaxies: II. Relativistic Iron K-alpha emission
• An X-ray spectral study of 24 type-1 AGN
• A light bending model for the X-ray temporal and spectral properties of accreting black holes
• The Spectrum of Diffuse Cosmic Hard X-Rays Measured with HEAO-1
• A long hard look at MCG-6-30-15 with XMM-Newton
• The Contribution of the Obscuring Torus to the X--Ray Spectrum of Seyfert Galaxies: A Test for the Unification Model
• A long, hard look at MCG-6-30-15 with XMM-Newton II: detailed EPIC analysis and modelling
• XMM-Newton study of the complex and variable spectrum of NGC 4051
• The Cores of the Fe K Lines in Seyfert I Galaxies Observed by the Chandra High Energy Grating
• Narrow Components within the Fe Kalpha Profile of NGC 3516: Evidence for the Importance of General Relativistic Effects?
• The Swift/BAT High Latitude Survey: First Results
• The XMM-Newton Iron Line Profile of NGC 3783
• The iron Kalpha Compton Shoulder in transmitted and reflected spectra
• An X-ray Baldwin effect for the narrow Fe K-alpha lines observed in Active Galactic Nuclei
• Flux and energy modulation of redshifted iron emission in NGC3516: implications for the black hole mass
• Exploring the complex X-ray spectrum of NGC 4051
• Complex X-ray Absorption and the Fe Kalpha Profile in NGC 3516
• A Chandra HETGS Spectral Study of the Iron K Bandpass in MCG-6-30-15: A Narrow View of the Broad Iron Line
• Relativistic O VIII Emission and Ionized Outflow in NGC 4051
• On the Origin of Broad Fe K alpha and Hi H alpha Lines in AGN
• Cyclotron resonance energies at a low X-ray luminosity: A0535+262 observed with Suzaku
• The soft X-ray absorption lines of the Seyfert 1 galaxy MCG--6-30-15
• Mutiwavelength Observations of Radio Galaxy 3C 120 with XMM-Newton
• The XMM-Newton View of the Broad-Line Radio Galaxy 3C 120

Cited by in corpus (28)

• An XMM-Newton survey of broad iron lines in Seyfert galaxies
• Relativistic X-ray Lines from the Inner Accretion Disks Around Black Holes
• Probes and Tests of Strong-Field Gravity with Observations in the Electromagnetic Spectrum
• The Swift BAT-detected Seyfert 1 Galaxies: X-ray Broadband Properties and Warm Absorbers
• Initial Measurements of Black Hole Spin in GX 339-4 from Suzaku Spectroscopy
• A compendium of AGN inclinations with corresponding UV/optical continuum polarization measurements
• Are there reliable methods to estimate the nuclear orientation of Seyfert galaxies?
• Relativistic Broadening of Iron Emission Lines in a Sample of AGN
• The Similarity of Broad Iron Lines in X-ray Binaries and Active Galactic Nuclei
• A Suzaku sample of unabsorbed narrow-line and broad-line Seyfert 1 galaxies: I. X-ray spectral properties
• A comparison of hard X-ray photon indices and iron \ka emission lines in X-ray luminous narrow- and broad-line Seyfert 1 galaxies
• The Seyfert 2 galaxy NGC 2110: hard X-ray emission observed by NuSTAR and variability of the iron K$\alpha$ line
• Searching for Narrow Emission Lines in X-ray Spectra: Computation and Methods
• Accretion Disk Illumination in Schwarzschild and Kerr Geometries: Fitting Formulae
• Rest-frame stacking of 2XMM catalog sources : Properties of the Fe Kalpha line
• Probing Unification With Chandra HETGS and XMM-Newton EPIC And RGS Spectroscopy of the Narrow Emission Line Galaxy NGC 2110
• Constraining the X-ray reflection in low accretion rate AGN using XMM-Newton, NuSTAR and Swift
• The warm absorber in NGC 5548: The lean years
• The Hard X-Ray View of Reflection, Absorption, and the Disk-Jet Connection in the Radio-Loud AGN 3C 33
• X-ray polarimetry as a new tool to discriminate reflection from absorption scenarios -- Predictions for MCG-6-30-15
• Nuclear X-ray properties of the peculiar radio-loud hidden AGN 4C+29.30
• Red-skewed K$\alpha$ iron lines in GX 13+1
• Probing the origin of the iron K_alpha line around stellar and supermassive black holes using X-ray polarimetry
• On the apparent absence of broad iron lines in Seyfert galaxies
• A Suzaku sample of unabsorbed narrow-line and broad-line Seyfert 1 galaxies: II. Iron emission and absorption
• Detection of Asymmetry in the Narrow Fe K$\alpha$ Emission Line in MCG-5-23-16 with Chandra
• X-ray polarization observations of NGC 2110 with IXPE
• X-ray emission of radio-loud quasar SDSS J121426.52+140258.9: independent variations between optical/UV and X-ray emission