Application of Clumpy Torus Model to Broadband X-ray Spectra of Two Seyfert 1 Galaxies: IC 4329A and NGC 7469

Abstract

We apply a new X-ray clumpy torus model called XCLUMPY (Tanimoto et al. 2019), where the clump distribution is assumed to be the same as in the infrared clumpy torus model (CLUMPY) by Nenkova et al. 2008, to the broadband X-ray spectra of type-1 active galactic nuclei (AGNs) for the first time. We analyze the archival data of IC 4329A and NGC 7469 observed with NuSTAR/Suzaku and NuSTAR/XMM-Newton, respectively, whose infrared spectra were studied with CLUMPY by Ichikawa et al. 2015 and optical extinctions ($A_{\mathrm{V}}$) of the tori were estimated. We consider two models, invoking (Model 1) a relativistic reflection component from the accretion disk and (Model 2) a partial absorber. Assuming that the narrow Fe K$\alpha$ emission line at 6.4 keV originates from the torus, we separate the contribution of the torus reflection components in the total spectra. Our models yield equatorial hydrogen column densities of the tori to be $N_{\mathrm{H}}^{\mathrm{Equ}}=$ (0.53--1.43) $\times 10^{23}\mathrm{c}{\mathrm{m}}^{-2}$ and $N_{\mathrm{H}}^{\mathrm{Equ}}=$ (0.84--1.43) $\times 10^{24}\mathrm{c}{\mathrm{m}}^{-2}$, for IC 4329A and NGC 7469, respectively. We find that the $N_{\mathrm{H}}/A_{\mathrm{V}}$ ratios in the tori are by factors of 25--68 (IC 4329A) and 2.4--3.9 (NGC 7469) smaller than that in the Galactic interstellar medium (ISM). These results suggest that a non-negligible fraction of AGNs are 'dust-rich' compared with the Galactic ISM, as opposite to the general trend previously reported in many obscured AGNs.

arXiv comment13 pages, 11 figures, (accepted in the Astrophysical Journal, ApJ)

References in corpus (51)

• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• Interstellar Dust Grains
• The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
• AGN Dusty Tori: II. Observational Implications of Clumpiness
• Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
• Hard X-ray Detector (HXD) on Board Suzaku
• An XMM-Newton survey of broad iron lines in Seyfert galaxies
• AGN Dusty Tori: I. Handling of Clumpy Media
• A Digital Archive of HI 21 cm Line Spectra of Optically-targeted Galaxies
• Monte-Carlo Simulator and Ancillary Response Generator of Suzaku XRT/XIS System for Spatially Extended Source Analysis
• Dust in active nuclei. I. Evidence for "anomalous" properties
• Irradiation of an Accretion Disc by a Jet: General Properties and Implications for Spin Measurements of Black Holes
• The close environments of accreting massive black holes are shaped by radiative feedback
• In-Orbit Performance of the Hard X-ray Detector on board Suzaku
• Broad emission lines for negatively spinning black holes
• Extreme X-ray spectral variability in the Seyfert 2 Galaxy NGC 1365
• X-ray Spectral Properties of the BAT AGN Sample
• Torus and AGN properties of nearby Seyfert galaxies: Results from fitting IR spectral energy distributions and spectroscopy
• New Spectral Model for Constraining Torus Covering Factors from Broadband X-ray Spectra of Active Galactic Nuclei
• An absorption origin for the X-ray spectral variability of MCG-6-30-15
• The Cores of the Fe K$\alpha$ Lines in Active Galactic Nuclei: an Extended Chandra High Energy Grating Sample
• The Origin of the X-ray and Ultraviolet Emission in NGC 7469
• FERO: Finding Extreme Relativistic Objects. I. Statistics of Relativistic Fe Kalpha lines in Radio-Quiet Type 1 AGN
• A Suzaku survey of Fe K lines in Seyfert 1 AGN
• Optical--to--X-ray emission in low-absorption AGN: Results from the Swift-BAT 9 month catalogue
• On the difference of torus geometry between hidden and non-hidden broad line active galactic nuclei
• BAT AGN Spectroscopic Survey - XI. The Covering Factor of Dust and Gas in Swift/BAT Active Galactic Nuclei
• Reverberation Mapping of the Seyfert 1 Galaxy NGC 7469
• The First INTEGRAL AGN Catalog
• Multiwavelength studies of the Seyfert 1 galaxy NGC7469. II - X-ray and UV observations with XMM-Newton
• Dust in active galactic nuclei. Mid-infrared T-ReCS/Gemini spectra using the new RedCan pipeline
• On the relation of optical obscuration and X-ray absorption in Seyfert galaxies
• The Broad-band X-ray Spectrum of IC 4329A from a Joint NuSTAR/Suzaku Observation
• Broad-Band Spectral Energy Distributions of Active Galactic Nuclei from an Accretion Disk with Advective Coronal Flow
• A panchromatic view of AGN
• XMM-Newton observations of the heavily absorbed Seyfert 1 galaxy IC 4329A
• The narrow Fe K$\alpha$ line and the molecular torus in active galactic nuclei - an IR/X-ray view
• Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations
• H1320+551: A Seyfert 1.8/1.9 galaxy with an unabsorbed X-ray spectrum
• Multi-wavelength campaign on NGC 7469 IV. The broad-band X-ray spectrum
• A Variable Partial Covering Model for the Seyfert 1 Galaxy MCG-6-30-15
• Sensitivity of the Fe K-alpha Compton shoulder to the geometry and variability of the X-ray illumination of cosmic objects
• High Resolution X-ray Spectroscopy of the Fe K complex in IC 4329A
• The complex iron line in NGC 7469 observed by BeppoSAX
• Suzaku View of the Swift/BAT Active Galactic Nuclei. V. Torus Structure of Two Luminous Radio-loud AGNs (3C 206 and PKS 0707-35)
• Origin of the Broad Iron Line Feature and the Soft X-ray Variation in Seyfert Galaxies
• Suzaku Discovery of a Slowly Varying Hard X-ray Continuum from the Type I Seyfert Galaxy NGC 3516
• A unique X-ray unabsorbed Seyfert 2 galaxy IRAS F01475-0740
• AGN with discordant optical and X-ray classification are not a physical family: Diverse origin in two AGN
• The New Primary X-ray Component Confirmed in the Seyfert I Galaxy IC4329A

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• Systematic Study of AGN Clumpy Tori with Broadband X-ray Spectroscopy: Updated Unified Picture of AGN Structure
• NuSTAR Observations of 52 Compton-thick Active Galactic Nuclei Selected by the Swift/BAT All-sky Hard X-Ray Survey
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• Hard X-Ray to Radio Multiwavelength SED Analysis of Local U/LIRGs in GOALS Sample with Self-consistent AGN Model Including Polar-dust Component
• Application of X-Ray Clumpy Torus Model (XCLUMPY) to 10 Obscured Active Galactic Nuclei Observed with Suzaku and NuSTAR
• Nature of Compton-thick Active Galactic Nuclei in "Non-merging'' Luminous Infrared Galaxies UGC 2608 and NGC 5135 Revealed with Broadband X-ray Spectroscopy
• Inferring the morphology of AGN torus using X-ray spectra: A reliability study
• Torus Constraints in ANEPD-CXO245: A Compton-thick AGN with Double-Peaked Narrow Lines
• Broadband X-ray Spectral Analysis of the Dual AGN System Mrk 739
• AstroSat/UVIT observations of IC4329A: Constraining the accretion disc inner radius
• Revealing Thermal Comptonization of accretion-disk photons in IC4329A with AstroSat
• Origin of the complex iron line structure and spectral variation in Mrk 766
• XMM-Newton --NuSTAR monitoring campaign of the Seyfert 1 galaxy IC 4329A
• Testing X-ray Reprocessing and Mapping the Soft Excess of NGC 7469 with NICER
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