| Autor: |
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., Vignali, Cristian, Vito, Fabio |
| Předmět: |
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| Zdroj: |
Astrophysical Journal; 7/1/2023, Vol. 951 Issue 1, p1-10, 10p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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