The Most Obscured AGNs in the XMM-SERVS Fields
The Most Obscured AGNs in the XMM-SERVS Fields
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DOI：
10.3847/1538-4357/accea6
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发表时间：
2023-04
期刊：
影响因子：
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通讯作者：
Wei Yan;W. Brandt;F. Zou;Shifu Zhu;Chien-Ting J. Chen;R. Hickox;B. Luo;Q. Ni;D. Alexander-D.-Alex
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文献类型：
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作者：
Wei Yan;W. Brandt;F. Zou;Shifu Zhu;Chien-Ting J. Chen;R. Hickox;B. Luo;Q. Ni;D. Alexander-D.-Alex
我们执行X射线光谱分析以获得特征（例如，在XMM-斯皮策河外代表性体积巡天中，我们对10，200个活动星系核（AGN）进行了X射线柱密度，X射线光度）的测量，该巡天旨在调查超大质量黑洞在广泛动态范围的宇宙环境中的生长。使用物理环面模型（例如，Borus 02）和贝叶斯方法，我们发现了22个具有代表性的康普顿厚度（CT; NH> 1.5 × 1024 cm−2）的活动星系核候选者，它们具有良好的信噪比，以及一个大样本的136个严重遮蔽的活动星系核。我们还发现，从低（z 0.75）红移的CT分数（f CT）增加。我们的CT候选者倾向于在其光谱能量分布拟合中显示硬X射线光谱形状和尘埃消光，这可能揭示活动星系核遮蔽与宿主星系演化之间的联系。
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) 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.