The Soft-Excess in Mrk 509: Warm Corona or Relativistic Reflection?

Abstract

We present the analysis of the first NuSTAR observations ($\sim 220$ ks), simultaneous with the last SUZAKU observations ($\sim 50$ ks), of the active galactic nucleus of the bright Seyfert 1 galaxy Mrk 509. The time-averaged spectrum in the $1-79$ keV X-ray band is dominated by a power-law continuum ($\Gamma \sim 1.8-1.9$), a strong soft excess around 1 keV, and signatures of X-ray reflection in the form of Fe K emission ($\sim 6.4$ keV), an Fe K absorption edge ($\sim 7.1$ keV), and a Compton hump due to electron scattering ($\sim 20-30$ keV). We show that these data can be described by two very different prescriptions for the soft excess: a warm ($kT\sim 0.5-1$ keV) and optically thick ($\tau \sim 10-20$) Comptonizing corona, or a relativistically blurred ionized reflection spectrum from the inner regions of the accretion disk. While these two scenarios cannot be distinguished based on their fit statistics, we argue that the parameters required by the warm corona model are physically incompatible with the conditions of standard coronae. Detailed photoionization calculations show that even in the most favorable conditions, the warm corona should produce strong absorption in the observed spectrum. On the other hand, while the relativistic reflection model provides a satisfactory description of the data, it also requires extreme parameters, such as maximum black hole spin, a very low and compact hot corona, and a very high density for the inner accretion disk. Deeper observations of this source are thus necessary to confirm the presence of relativistic reflection, and to further understand the nature of its soft excess.

arXiv commentAccepted for publication in ApJ, 18 pages, 7 figures

References in corpus (76)

• On the Absorption of X-rays in the Interstellar Medium
• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
• Atomic Data for Astrophysics. II. New Analytic Fits for Photoionization Cross Sections of Atoms and Ions
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• On characterising the variability properties of X-ray light curves from active galaxies
• AGN Black Hole Masses and Bolometric Luminosities
• Broad-band gamma-ray and X-ray spectra of NGC 4151 and their implications for physical processes and geometry
• Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
• Intrinsic disc emission and the Soft X-ray Excess in AGN
• The May 1989 outburst of the Soft X-ray Transient GS 2023+338 (V404 Cyg)
• Going with the flow: can the base of jets subsume the role of compact accretion disk coronae?
• BAT AGN Spectroscopic Survey - V. X-ray properties of the Swift/BAT 70-month AGN catalog
• X-ray reflected spectra from accretion disk models. III. A complete grid of ionized reflection calculations
• An X-ray Spectral Model for Compton-Thick Toroidal Reprocessors
• Piecing Together the X-ray Background: Bolometric Corrections for Active Galactic Nuclei
• An Explanation for the soft X-ray excess in AGN
• The XMM-Newton view of PG quasars I. X-ray continuum and absorption
• Is the soft excess in AGN real?
• Irradiation of an Accretion Disc by a Jet: General Properties and Implications for Spin Measurements of Black Holes
• X-ray reflected spectra from accretion disk models. I. Constant density atmospheres
• A Comprehensive Spectral and Variability Study of Narrow-Line Seyfert 1 Galaxies Observed by ASCA: II. Spectral Analysis and Correlations
• The IRAS 1.2 Jy Survey: Redshift Data
• An XMM-Newton spectral survey of 12 micron selected galaxies. I. X-ray data
• Suzaku observations of 'bare' active galactic nuclei
• A rapidly spinning supermassive black hole at the centre of NGC 1365
• Calibration of the NuSTAR High Energy Focusing X-ray Telescope
• XMM-Newton EPIC observations of 21 low-redshift PG quasars
• New Spectral Model for Constraining Torus Covering Factors from Broadband X-ray Spectra of Active Galactic Nuclei
• Testing warm Comptonization models for the origin of the soft X-ray excess in AGN
• Normalizing a Relativistic Model of X-ray Reflection: The Definition of the Reflection Fraction and its Implementation in relxill
• High-Density Effects in X-ray Reflection Models from Accretion Disks
• How the X-ray spectrum of a Narrow-Line Seyfert 1 galaxy may be reflection dominated
• Multiwavelength campaign on Mrk 509. IV. Optical-UV-X-ray variability and the nature of the soft X-ray excess
• The response of relativistic outflowing gas to the inner accretion disk of a black hole
• Multiwavelength campaign on Mrk 509 XII. Broad band spectral analysis
• Alternative explanations for extreme supersolar iron abundances inferred from the energy spectrum of Cygnus X-1
• Universal spectral shape of high accretion rate AGN
• The Soft State of Cygnus X-1 Observed with NuSTAR: A Variable Corona and a Stable Inner Disk
• IACHEC Cross-Calibration of Chandra, NuSTAR, Swift, Suzaku, and XMM-Newton with 3C 273 and PKS 2155-304
• A NuSTAR census of coronal parameters in Seyfert galaxies
• The 1.5 Ms Observing Campaign on IRAS 13224-3809: X-ray Spectral Analysis I
• NuSTAR and XMM-Newton Observations of NGC 1365: Extreme Absorption Variability and a Constant Inner Accretion Disk
• RE J1034+396: The origin of the soft X-ray excess and QPO
• A deep X-ray view of the bare AGN Ark120. IV. XMM-Newton and NuSTAR spectra dominated by two temperature (warm, hot) Comptonization processes
• Iron K$\alpha$ emission in type-I and type-II Active Galactic Nuclei
• The high-Eddington NLS1 Ark 564 has the coolest corona
• The Broad-band X-ray Spectrum of IC 4329A from a Joint NuSTAR/Suzaku Observation
• The XMM-Newton view of AGN with intermediate mass black holes
• The existence of warm and optically thick dissipative coronae above accretion disks
• A hard X-ray view of the soft excess in AGN
• X-ray evidence for a mildly relativistic and variable outflow in the luminous Seyfert 1 galaxy Mrk509
• Multiwavelength campaign on Mrk 509. I. Variability and spectral energy distribution
• Coronal Properties of the Seyfert 1.9 Galaxy MCG -05-23-016 Determined from Hard X-ray Spectroscopy with NuSTAR
• The effects of a comptonizing corona on the appearance of the reflection components in accreting black hole spectra
• Revealing the accretion disc corona in Mrk 335 with multi-epoch X-ray spectroscopy
• Anatomy of the AGN in NGC 5548: III. The high-energy view with NuSTAR and INTEGRAL
• The Seyfert AGN RX J0136.9-3510 and the Spectral State of Super Eddington Accretion Flows
• On Estimating the High-Energy Cutoff in the X-ray Spectra of Black Holes via Reflection Spectroscopy
• Broadband X-ray spectral analysis of the Seyfert 1 galaxy GRS 1734-292
• Tracking the Iron K$\alpha$ line and the Ultra Fast Outflow in NGC 2992 at different accretion states
• A direct comparison of X-ray spectral models for tori in active galactic nuclei
• A high-density relativistic reflection origin for the soft and hard X-ray excess emission from Mrk 1044
• A deep X-ray view of the bare AGN Ark 120. II. Evidence for Fe K emission transients
• Cross-calibration of Suzaku XIS and XMM-Newton EPIC using clusters of galaxies
• X-ray reflection from the inner disk of the AGN Ton S180
• Multiwavelength campaign on Mrk 509. XIII. Testing ionized-reflection models on Mrk 509
• The XMM-Newton RGS spectrum of the high luminosity Seyfert 1 galaxy Markarian 509
• Evidence for Relativistic Disk Reflection in the Seyfert 1h Galaxy/ULIRG IRAS 05189-2524 Observed by NuSTAR and XMM-Newton
• The hard X-ray perspective on the soft X-ray excess
• Multiwavelength campaign on Mrk 509 XV. A global modeling of the broad emission lines in the Optical, UV and X-ray bands
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• Multiwavelength campaign on Mrk 509 XIV. Chandra HETGS spectra
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• A simple framework for modelling the dependence of bulk Comptonization by turbulence on accretion disc parameters

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