Iron K features in the hard X-ray XMM-Newton spectrum of NGC 4151

Abstract

Recent XMM-Newton observations have measured the hard (2.5-12 keV) X-ray spectrum of the well-known Seyfert galaxy NGC 4151 with a signal-to-noise unprecedented for this source. We find that a spectral model, developed to fit previous Beppo-SAX and ASCA observations of NGC 4151, provides an excellent description of the XMM-Newton EPIC data. The results support the view that it is the level of the continuum that is the main driver of the complex spectral variability exhibited by NGC 4151. We focus on the iron K features in the NGC 4151 spectrum. There is no requirement for a relativistically broadened iron Ka line, in contrast to several earlier studies. The iron Ka line profile is well modelled by a narrow Gaussian, the intensity of which varies by ~25% on timescales of about a year. There is also a strong suggestion that the cold media present in the active nucleus of NGC 4151 have an iron abundance that is at least twice the solar value.

arXiv comment7 Pages, 3 figures, Accepted for publication in MNRAS

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• A long, hard look at MCG-6-30-15 with XMM-Newton II: detailed EPIC analysis and modelling
• Relativistic iron K X-ray Reverberation in NGC 4151
• The XMM-Newton Iron Line Profile of NGC 3783
• Long-Term X-ray Spectral Variability in Seyfert 1 Galaxies
• Rapid N_H changes in NGC 4151
• Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. I. Spatially Resolved Mass Outflow Rates for the Seyfert 2 Galaxy Markarian 573
• Relativistic Iron K Emission and absorption in the Seyfert 1.9 galaxy MCG-5-23-16
• A Deep Chandra ACIS Study of NGC 4151. II. The Innermost Emission Line Region and Strong Evidence for Radio Jet-NLR Cloud Collision
• Revealing the High Energy Emission from the Obscured Seyfert Galaxy MCG -5-23-16 with Suzaku
• Revisiting The Spectral and Timing Properties of NGC 4151
• Extreme flux states of NGC 4151 observed with INTEGRAL
• Spectral Statistics and Local Luminosity Function of a Hard X-ray Complete Sample of Brightest AGNs
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• A Suzaku, NuSTAR, and XMM-Newton view on variable absorption and relativistic reflection in NGC 4151
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• Spectral Survey of X-Ray Bright Active Galactic Nuclei from the Rossi X-ray Timing Explorer
• The complex soft X-ray spectrum of NGC 4151
• The broad band spectrum and variability of NGC 4151 observed by BeppoSAX
• The High Energy Spectrum of NGC 4151
• The Difference in Narrow Fe KαLine Emission Between Seyfert 1 and Seyfert 2 Galaxies
• A complete view of the broad-line radio galaxy 4C+74.26 with XMM-Newton
• The reprocessing features in the X-ray spectrum of the NELG MCG-5-23-16
• Revisit Short Term X-ray Spectral Variability of NGC 4151 with Chandra
• Black Hole Spin in AGN and GBHCs
• The messy environment of Mrk 6
• On the driver of relativistic effects strength in Seyfert galaxies
• The X-ray variability history of Markarian 3
• Rms variability properties of the iron K alpha line in Seyfert galaxies
• Relativistic reflection in NGC 4151