The Most Obscured AGNs in the XMM-SERVS Fields

Journal
Date Issued
2023
Author(s)
Yan, Wei
•
Brandt, W. N.
•
Zou, Fan
•
Zhu, Shifu
•
Chen, Chien Ting J.
•
Hickox, Ryan C.
•
Luo, Bin
•
Ni, Qingling
•
Alexander, David M.
•
Bauer, Franz E.
•
•
DOI
Abstract
We perform X-ray spectral analyses to derive the characteristics (e.g., column density, X-ray luminosity) of ≈10,200 active galactic nuclei (AGNs) in the XMM-Spitzer Extragalactic Representative Volume Survey, 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 H > 1.5 × 1024 cm−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 (f CT) 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 spectral energy distribution fits, which may shed light on the connection between AGN obscuration and host-galaxy evolution.
Volume
951
Issue
1
Start page
27
Uri
Url
Issn Identifier
0004-637X
Rights
open.access
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