The Most Obscured AGNs in the XMM-SERVS Fields

Abstract

We perform X-ray spectral analyses to derive characteristics (e.g., column density, X-ray luminosity) of $\approx$10,200 active galactic nuclei (AGNs) in the XMM-Spitzer Extragalactic Representative Volume Survey (XMM-SERVS), which was designed to investigate the growth of supermassive black holes across a wide dynamic range of cosmic environments. Using physical torus models (e.g., Borus02) and a Bayesian approach, we uncover 22 representative Compton-thick (CT; $N_{\mathrm{H}}>1.5\times 10^{24}\mathrm{c}{\mathrm{m}}^{-2}$) AGN candidates with good signal-to-noise ratios as well as a large sample of 136 heavily obscured AGNs. We also find an increasing CT fraction (\fct ) from low ($z<0.75$) to high ($z>0.75$) redshift. Our CT candidates tend to show hard X-ray spectral shapes and dust extinction in their SED fits, which may shed light on the connection between AGN obscuration and host-galaxy evolution.

arXiv comment12 pages, 9 figures, accepted for publication in ApJ

References in corpus (42)

• Energy input from quasars regulates the growth and activity of black holes and their host galaxies
• X-ray spectral modelling of the AGN obscuring region in the CDFS: Bayesian model selection and catalogue
• A Cosmology Calculator for the World Wide Web
• The synthesis of the cosmic X-ray background in the Chandra and XMM-Newton era
• Revisiting the Unified Model of Active Galactic Nuclei
• 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
• How Do Disks Survive Mergers?
• Obscured Active Galactic Nuclei
• Andromeda's Dust
• Cosmic X-ray Surveys of Distant Active Galaxies: The Demographics, Physics, and Ecology of Growing Supermassive Black Holes
• The Space Density of Compton Thick AGN and the X-ray Background
• Obscuration-dependent evolution of Active Galactic Nuclei
• New Spectral Model for Constraining Torus Covering Factors from Broadband X-ray Spectra of Active Galactic Nuclei
• Fitting AGN/galaxy X-ray-to-radio SEDs with CIGALE and improvement of the code
• High-redshift AGN in the Chandra Deep Fields: the obscured fraction and space density of the sub-$L_{\ast }$ population
• The Accretion History of AGN I: Supermassive Black Hole Population Synthesis Model
• Deep Silicate absorption features in Compton-thick AGN predominantly arise due to dust in the host galaxy
• Reliable Identification of Compton-thick Quasars at z~2: Spitzer Mid-IR spectroscopy of HDF-oMD49
• A large population of mid-infrared selected, obscured active galaxies in the Bootes field
• The evolution of the Compton thick fraction and the nature of obscuration for AGN in the Chandra Deep Field South
• The XMM-SERVS survey: new XMM-Newton point-source catalog for the XMM-LSS field
• Beyond UVJ: More Efficient Selection of Quiescent Galaxies With UV / Mid-IR Fluxes
• The Chandra COSMOS Legacy Survey: Compton Thick AGN at high redshift
• NuSTAR Reveals Extreme Absorption in z < 0.5 Type 2 Quasars
• The Host-Galaxy Properties of Type 1 Versus Type 2 Active Galactic Nuclei
• NuSTAR observations of WISE J1036+0449, a Galaxy at z$\sim 1$ obscured by hot dust
• Heavy X-ray obscuration in the most-luminous galaxies discovered by WISE
• A Compton-thick AGN at z~5 in the 4 Ms Chandra Deep Field South
• Obscuring Active Galactic Nuclei with Nuclear Starburst Disks
• On the cosmic evolution of AGN obscuration and the X-ray luminosity function: XMM-Newton and Chandra spectral analysis of the 31.3 deg${}^2$ Stripe 82X
• The NuSTAR Extragalactic Surveys: First Direct Measurements of the >10 keV X-Ray Luminosity Function for Active Galactic Nuclei at z>0.1
• The NuSTAR Serendipitous Survey: Hunting for The Most Extreme Obscured AGN at >10 keV
• Survival of the obscuring torus in the most powerful active galactic nuclei
• Spectral Energy Distributions in Three Deep-Drilling Fields of the Vera C. Rubin Observatory Legacy Survey of Space and Time: Source Classification and Galaxy Properties
• The XMM-SERVS survey: XMM-Newton point-source catalogs for the W-CDF-S and ELAIS-S1 fields
• X-ray constraints on the fraction of obscured AGN at high accretion luminosities
• Supermassive Black-Hole Growth Over Cosmic Time: Active Galaxy Demography, Physics, and Ecology from Chandra Surveys
• The demographics of obscured AGN from X-ray spectroscopy guided by multiwavelength information
• X-ray redshifts for obscured AGN: a case study in the J1030 deep field
• NuSTAR and Keck Observations of Heavily Obscured Quasars Selected by WISE
• The Merger-Triggered Active Galactic Nuclei Contribution to the Ultraluminous Infrared Galaxy Population
• Photometric Redshifts in the W-CDF-S and ELAIS-S1 Fields Based on Forced Photometry from 0.36 -- 4.5 Microns

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