The Seyfert 2 galaxy NGC 2110: hard X-ray emission observed by NuSTAR and variability of the iron K$\alpha$ line

Abstract

We present NuSTAR observations of the bright Seyfert 2 galaxy NGC 2110 obtained in 2012, when the source was at the highest flux level ever observed, and in 2013, when the source was at a more typical flux level. We include archival observations from other X-ray satellites, namely XMM-Newton, Suzaku, BeppoSAX, Chandra and Swift. Simultaneous NuSTAR and Swift broad band spectra (in the 3-80 keV range) indicate a cutoff energy $E_{\mathrm{c}}>210$ keV, with no detectable contribution from Compton reflection. NGC 2110 is one of the very few sources where no evidence for distant Compton thick scattering is found and, by using temporal information collected over more than a decade, we investigate variations of the iron K$\alpha$ line on time scales of years. The Fe K$\alpha$ line is likely the sum of two components: one constant (originating from distant Compton-thick material) and the other one variable and linearly correlated with the source flux (possibly arising from Compton-thin material much closer to the black hole).

arXiv comment10 pages, 6 figures, accepted for publication on MNRAS

References in corpus (38)

• 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 European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
• Atomic Data for Astrophysics. II. New Analytic Fits for Photoionization Cross Sections of Atoms and Ions
• Local Supermassive Black Holes, Relics of Active Galactic Nuclei and the X-ray Background
• A fundamental plane of black hole activity
• An XMM-Newton survey of broad iron lines in Seyfert galaxies
• An X-ray Spectral Model for Compton-Thick Toroidal Reprocessors
• Resolving the mid-infrared cores of local Seyferts
• CAIXA: a Catalogue of AGN In the XMM-Newton Archive I. Spectral analysis
• Changing look: from Compton-thick to Compton-thin, or the re-birth of fossil AGN
• Dust in the polar region as a major contributor to the IR emission of AGN
• The Nature of the Compton-thick X-ray Reprocessor in NGC 4945
• Evidence for a multizone warm absorber in the XMM-Newton spectrum of Markarian 304
• The dusty heart of nearby active galaxies. I. High-spatial resolution mid-IR spectro-photometry of Seyfert galaxies
• The X-ray and Radio Connection in Low-luminosity Active Nuclei
• Seyfert galaxies in the local Universe (z$\le$ 0.1): the average X-ray spectrum as seen by $BeppoSAX$
• 9.7 um Silicate Features in AGNs: New Insights into Unification Models
• Silicate emissions in active galaxies - From LINERs to QSOs
• Simultaneous NuSTAR and XMM-Newton 0.5-80 keV spectroscopy of the Narrow Line Seyfert 1 galaxy SWIFT J2127.4+5654
• Reflection in Seyfert Galaxies and the Unified Model of AGN
• X-ray reprocessing in Seyfert Galaxies: simultaneous XMM-Newton/BeppoSAX observations
• The soft X-ray emission of Ark 120. XMM-Newton, NuSTAR, and the importance of taking the broad view
• The Ubiquitous Radio Continuum Emission from the Most Massive Early-Type Galaxies
• A BLR origin for the iron K$\alpha$ line in NGC7213
• The X-ray reflector in NGC 4945: a time and space resolved portrait
• CAIXA: a Catalogue of AGN In the XMM-Newton Archive II. Multiwavelength correlations
• The Origin of the Silicate Emission Features in the Seyfert 2 Galaxy, NGC 2110
• The origin of the iron lines in NGC 7213
• Measuring the Coronal Properties of IC4329A with NuSTAR
• The Chandra, HST, and VLA View of the Circumnuclear Extended Emission in the Narrow Emission Line Galaxy NGC 2110
• Suzaku Observations of Iron Lines and Reflection in AGN
• Evidence for a Truncated Accretion Disc in the Low Luminosity Seyfert Galaxy, NGC 7213?
• Transient and Highly Polarized Double-Peaked H-alpha Emission in the Seyfert 2 Nucleus of NGC 2110
• Probing Unification With Chandra HETGS and XMM-Newton EPIC And RGS Spectroscopy of the Narrow Emission Line Galaxy NGC 2110
• Tracking the Complex Absorption in NGC 2110 with Two Suzaku Observations
• Hidden Double-Peaked Emitters in Seyfert 2 Galaxies

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