reXcor: A Model of the X-ray Spectrum of Active Galactic Nuclei that Combines Ionized Reflection and a Warm Corona

Abstract

The X-ray spectra of active galactic nuclei (AGNs) often exhibit an excess of emission above the primary power-law at energies <~ $2$ keV. Two models for the origin of this `soft excess' are ionized relativistic reflection from the inner accretion disc and Comptonization of thermal emission in a warm corona. Here, we introduce reXcor, a new AGN X-ray ($0.3$-$100$ keV) spectral fitting model that self-consistently combines the effects of both ionized relativistic reflection and the emission from a warm corona. In this model, the accretion energy liberated in the inner disc is distributed between a warm corona, a lamppost X-ray source, and the accretion disc. The emission and ionized reflection spectrum from the inner $400$ $r_g$ of the disc is computed, incorporating the effects of relativistic light-bending and blurring. The resulting spectra predict a variety of soft excess shapes and sizes that depend on the fraction of energy dissipated in the warm corona and lamppost. We illustrate the use of reXcor by fitting to the joint XMM-Newton and NuSTAR observations of the Seyfert 1 galaxies HE 1143-1820 and NGC 4593, and find that both objects require a warm corona contribution to the soft excess. Eight reXcor table models, covering different values of accretion rate, lamppost height and black hole spin, are publicly available through the XSPEC website. Systematic use of reXcor will provide insight into the distribution of energy in AGN accretion flows.

17 pages, 11 figures, accepted by MNRAS. The reXcor table models can be downloaded here: https://github.com/HEASARC/xspec_localmodels/tree/master/reXcor

References in corpus (20)

• Piecing Together the X-ray Background: Bolometric Corrections for Active Galactic Nuclei
• Simultaneous X-ray/optical/UV snapshots of active galactic nuclei from XMM-Newton: spectral energy distributions for the reverberation mapped sample
• The close environments of accreting massive black holes are shaped by radiative feedback
• Observational Constraints on Black Hole Spin
• CAIXA: a Catalogue of AGN In the XMM-Newton Archive I. Spectral analysis
• Reverberation mapping of Active Galactic Nuclei: from X-ray corona to dusty torus
• A deep X-ray view of the bare AGN Ark120. IV. XMM-Newton and NuSTAR spectra dominated by two temperature (warm, hot) Comptonization processes
• Radiation spectra of warm and optically thick coronae in AGN
• Tomographic reflection modelling of quasi-periodic oscillations in the black hole binary H 1743-322
• The soft X-ray excess: NLS1s vs. BLS1s
• NuSTAR/XMM-Newton monitoring of the Seyfert 1 galaxy HE 1143-1810. Testing the two-corona scenario
• High-energy monitoring of NGC 4593 with XMM-Newton and NuSTAR. X-ray spectral analysis
• The Nature of Soft Excess in ESO 362-G18 Revealed by XMM-Newton and NuSTAR Spectroscopy
• The soft excess of the NLS1 galaxy Mrk 359 studied with an XMM-Newton-NuSTAR monitoring campaign
• Examining the Physical Conditions of a Warm Corona in Active Galactic Nuclei Accretion Discs
• Sustaining a Warm Corona in Active Galactic Nuclei Accretion Discs
• The first simultaneous X-ray broad-band view of Mrk 110 with XMM-Newton and NuSTAR
• The origin of the soft X-ray excess in the narrow-line Seyfert 1 galaxy SBS 1353+564
• Ionised Accretion Discs in Active Galactic Nuclei: The Effects of a Lamppost with a Variable Height
• A weakening Compton hump and soft X-ray excess detected in the Seyfert-1 galaxy MCG-02-58-22

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