The nature of the torus in the heavily obscured AGN Markarian 3: an X-ray study

Abstract

In this paper we report the results of an X-ray monitoring campaign on the heavily obscured Seyfert galaxy Markarian 3 carried out between the fall of 2014 and the spring of 2015 with NuSTAR, Suzaku and XMM-Newton. The hard X-ray spectrum of Markarian 3 is variable on all the time scales probed by our campaign, down to a few days. The observed continuum variability is due to an intrinsically variable primary continuum seen in transmission through a large, but still Compton-thin column density (N_H~0.8-1.1$\times$10${}^{24}$ cm${}^{-2}$). If arranged in a spherical-toroidal geometry, the Compton scattering matter has an opening angle ~66 degrees and is seen at a grazing angle through its upper rim (inclination angle ~70 degrees). We report a possible occultation event during the 2014 campaign. If the torus is constituted by a system of clouds sharing the same column density, this event allows us to constrain their number (17$\pm$5) and individual column density, [~(4.9$\pm$1.5)$\times$10${}^{22}$ cm${}^{-2}$]. The comparison of IR and X-ray spectroscopic results with state-of-the art "torus" models suggests that at least two thirds of the X-ray obscuring gas volume might be located within the dust sublimation radius. We report also the discovery of an ionized absorber, characterised by variable resonant absorption lines due to He- and H-like iron. This discovery lends support to the idea that moderate column density absorbers could be due to clouds evaporated at the outer surface of the torus, possibly accelerated by the radiation pressure due to the central AGN emission leaking through the patchy absorber.

arXiv commentAccepted for publication in MNRAS, 17 pages, 11 figures, 5 tables

References in corpus (64)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• 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
• Revisiting the Unified Model of Active Galactic Nuclei
• AGN Black Hole Masses and Bolometric Luminosities
• AGN Dusty Tori: II. Observational Implications of Clumpiness
• Active Galactic Nuclei as scaled-up Galactic black holes
• Evidence for ultra-fast outflows in radio-quiet AGNs: I - detection and statistical incidence of Fe K-shell absorption lines
• Updated Atomic Data and Calculations for X-ray Spectroscopy
• An X-ray Spectral Model for Compton-Thick Toroidal Reprocessors
• Reverberation Measurements of the Inner Radius of the Dust Torus in Nearby Seyfert 1 Galaxies
• A 3 dimensional diagnostic diagram for Seyfert 2s: probing X-ray absorption and Compton thickness
• The nature and origin of Seyfert warm absorbers
• Simultaneous X-ray/optical/UV snapshots of active galactic nuclei from XMM-Newton: spectral energy distributions for the reverberation mapped sample
• Photoionization Modeling and the K Lines of Iron
• An XMM-Newton spectral survey of 12 micron selected galaxies. I. X-ray data
• Calibration of the NuSTAR High Energy Focusing X-ray Telescope
• The Hard X-ray Spectrum as a Probe for Black-Hole Growth in Radio-Quiet Active Galactic Nuclei
• The origin of the Broad Line Region in Active Galactic Nuclei
• A diversity of dusty AGN tori: Data release for the VLTI/MIDI AGN Large Program and first results for 23 galaxies
• Occultation measurement of the size of the X-ray emitting region in the Active Galactic Nucleus of NGC 1365
• Reverberation Measurements of the Inner Radius of the Dust Torus in 17 Seyfert Galaxies
• First X-ray-Based Statistical Tests for Clumpy-Torus Models: Eclipse Events from 230 Years of Monitoring of Seyfert AGN
• The innermost region of AGN tori: implications from the HST/NICMOS Type 1 point sources and near-IR reverberation
• The Compact, Conical, Accretion-Disk Warm Absorber of the Seyfert 1 Galaxy NGC 4051 and its Implications for IGM-Galaxy Feedback Processes
• A statistical relation between the X-ray spectral index and Eddington ratio of active galactic nuclei in deep surveys
• A soft X-ray study of Type I AGN observed with Chandra HETGS
• The Nature of the Compton-thick X-ray Reprocessor in NGC 4945
• X-ray Microlensing in RXJ1131-1231 and HE1104-1805
• Aborted jets and the X-ray emission of radio-quiet AGNs
• The Chandra High Energy Transmission Grating Observation of an X-ray Ionization Cone in Markarian 3
• Warm absorbers in X-rays (WAX), a comprehensive high resolution grating spectral study of a sample of Seyfert galaxies: I. A global view and frequency of occurrence of warm absorbers
• NuSTAR Spectroscopy of Multi-Component X-ray Reflection from NGC 1068
• The SDSS/XMM-Newton Quasar Survey: Correlation between X-ray spectral slope and Eddington ratio
• NuSTAR catches the unveiling nucleus of NGC 1068
• The 2-79 keV X-ray Spectrum of the Circinus Galaxy with NuSTAR, XMM-Newton and Chandra: a Fully Compton-Thick AGN
• Study on X-ray Spectra of Obscured AGNs based on Monte Carlo simulation - an interpretation of observed wide-band spectra
• Further Evidence that Quasar X-Ray Emitting Regions Are Compact: X-Ray and Optical Microlensing in the Lensed Quasar Q J0158-4325
• AGN Obscuration and the Unified Model
• The NuSTAR View of Nearby Compton-thick AGN: The Cases of NGC 424, NGC 1320 and IC 2560
• Highly ionized iron absorption lines from outflowing gas in the X-ray spectrum of NGC 1365
• Iron K$\alpha$ emission in type-I and type-II Active Galactic Nuclei
• Fe XXV and Fe XXVI lines from low velocity, photoionised gas in the X-ray spectra of AGN
• Iron and Nickel properties in the X-ray reflecting region of the Circinus Galaxy
• An absorption event in the X-ray lightcurve of NGC 3227
• The variable hard X-ray emission of NGC4945 as observed by NuSTAR
• NuSTAR unveils a Compton-thick Type 2 quasar in Mrk 34
• Determining the covering factor of Compton-thick active galactic nuclei with NuSTAR
• The XMM-Newton view of Mrk3 and IXO30
• The dust sublimation radius as an outer envelope to the bulk of the narrow Fe Kalpha line emission in Type 1 AGN
• A Census of X-ray gas in NGC 1068: Results from 450ks of Chandra HETG Observation
• The NuSTAR view of reflection and absorption in NGC 7582
• X-ray spectral variability of Seyfert 2 galaxies
• Search for X-ray occultations in Active Galactic Nuclei
• A Compton-thin Solution for the Suzaku X-ray Spectrum of the Seyfert 2 Galaxy Mkn 3
• NGC 1365: A low column density state unveiling a low ionization disk wind
• Wide-band spectroscopy of the Compton thick Seyfert 2 galaxy Mrk 3 with Suzaku
• Physical Conditions in the Narrow-Line Region of Markarian 3. II. Photoionization Modeling Results
• Modelling photometric reverberation data -- a disk-like broad-line region and a potentially larger black hole mass for 3C120
• An X-ray variable absorber within the Broad Line Region in Fairall 51
• Dimming and CO absorption toward the AA Tau protoplanetary disk: An infalling flow caused by disk instability?
• The X-ray variability history of Markarian 3
• High Spatial Resolution of the Mid-Infrared Emission of Compton-Thick Seyfert 2 Galaxy Mrk3
• Deep X-ray spectroscopy and imaging of the Seyfert 2 galaxy, ESO 138-G001

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• A Highly Accreting Low-Mass Black Hole Hidden in the Dust: Suzaku and NuSTAR observations of the NLS1 Mrk 1239
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