Compton-thick AGN in the NuSTAR Era X: Analysing seven local CT-AGN candidates

Abstract

We present the broad-band X-ray spectral analysis (0.6-50 keV) of seven Compton-Thick active galactic nuclei (CT-AGN; line-of-sight, l.o.s., column density $>10^{24}$ cm${}^{-2}$) candidates selected from the Swift-BAT 100-month catalog, using archival NuSTAR data. This work is in continuation of the on-going research of the Clemson-INAF group to classify CT-AGN candidates at redshift $z<0.05$, using physically-motivated torus models. Our results confirm that three out of seven targets are \textit{bona-fide} CT-AGN. Adding our results to the previously analysed sources using NuSTAR data, we increase the population of bona-fide CT-AGN by $\sim 9\%$, bringing the total number to 35 out of 414 AGN. We also performed a comparative study using MyTorus and borus02 on the spectra in our sample, finding that both physical models are strongly consistent in the parameter space of l.o.s. column density and photon index. Furthermore, the clumpiness of the torus clouds is also investigated by separately computing the line-of-sight and average torus column densities, in each of the seven sources. Adding our results to all the previous 48 CT-AGN candidates analysed by the Clemson-INAF research team having NuSTAR observations: we find $78\%$ of the sources are likely to have a clumpy distribution of the obscuring material surrounding the accreting supermassive black hole.

Accepted for publication in the Section 4. Extragalactic astronomy of Astronomy and Astrophysics, 20 pages, 10 figures

References in corpus (21)

• The synthesis of the cosmic X-ray background in the Chandra and XMM-Newton era
• Toward the Standard Population Synthesis Model of the X-Ray Background: Evolution of X-Ray Luminosity and Absorption Functions of Active Galactic Nuclei Including Compton-Thick Populations
• The 1% Concordance Hubble Constant
• Cosmic X-ray background and Earth albedo Spectra with Swift/BAT
• Raining on black holes and massive galaxies: the top-down multiphase condensation model
• Linking Macro, Meso, and Micro Scales in Multiphase AGN Feeding and Feedback
• The Chandra COSMOS-Legacy survey: Source X-ray spectral properties
• Supermassive Black Holes at High Redshift are Expected to be Obscured by their Massive Host Galaxies' Inter Stellar Medium
• Compton-Thick AGN in the NuSTAR era VI: The observed Compton-thick fraction in the Local Universe
• Compton-thick AGN in the NuSTAR era III: A systematic study of the torus covering factor
• AGN feeding and feedback in Fornax A: kinematical analysis of the multi-phase ISM
• NuSTAR Observations of 52 Compton-thick Active Galactic Nuclei Selected by the Swift/BAT All-sky Hard X-Ray Survey
• The dust-gas AGN torus as constrained from X-ray and mid-infrared observations
• Shedding Light on the Compton-thick Active Galactic Nucleus in the Ultra-luminous Infrared Galaxy UGC 5101 with Broadband X-ray Spectroscopy
• Physically motivated X-ray obscurer models
• Compton-Thick AGN in the NuSTAR era VIII: A joint NuSTAR-XMM-Newton monitoring of the changing-look Compton-thick AGN NGC 1358
• Probing multiphase gas in local massive elliptical galaxies via multiwavelength observations
• Compton-thick AGN in the NuSTAR era IV: A deep NuSTAR and XMM-Newton view of the candidate Compton thick AGN in ESO 116-G018
• Compton-Thick AGN in the NuSTAR era VII. A joint NuSTAR, Chandra and XMM-Newton analysis of two nearby, heavily obscured sources
• Compton-thick AGN in the NuSTAR Era. IX. A Joint NuSTAR and XMM-Newton Analysis of Four Local AGN
• A multi-epoch X-ray study of the nearby Seyfert 2 galaxy NGC 7479: Linking column density variability to the torus geometry

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• X-ray Redshifts for Obscured Active Galactic Nuclei with AXIS Deep and Intermediate Surveys
• The Compton-thick AGN luminosity function in the local Universe: A robust estimate combining BAT detections and NuSTAR spectra
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• A Multi-Wavelength Characterization of the Obscuring Medium at the Center of NGC 6300
• On joint analysing XMM-NuSTAR spectra of active galactic nuclei
• Source identification for the Swift-BAT 150-month hard X-ray catalog using soft X-ray observations
• Compton-thick AGN Characterisation in a Multi-wavelength Context: Insights from the 70-Month \textit{SWIFT}/BAT Catalogue
• The properties of the obscuring material of an AGNs sample from mid-IR and X-ray simultaneous fitting
• Accretion-disk reflection in the Seyfert 1 galaxy NGC 3783 as viewed by Chandra grating spectroscopy