Large-scale clustering of buried X-ray AGN: Trends in AGN obscuration and redshift evolution

In order to test active galactic nucleus (AGN) unification and evolutionary models, we measured the AGN clustering properties as a function of obscuration defined in terms hydrogen column density, $N_{\rm H}$. addition measuring unobscured ($N_{\rm H} < 10^{22}\,{\rm cm}^{-2}$) moderately obscured ($10^{22} \leq N_{\rm 10^{23.5}$) AGNs, also targeted highly sources H}\geq up redshifts $z=3$. We have compiled one largest samples X-ray-selected AGNs from total eight deep XMM/Chandra surveys. both redshift using projected two-point correlation function, $w_{\rm p}(r_{\rm p})$. modeled large-scale signal, bias, $b(z, H})$, interpreted it typical host dark matter halo, $M_{\rm halo}(z, H}$). find no significant dependence on obscuration, suggesting similar masses hosting halos This result matches expectations which depends mainly viewing angle obscuring torus. measured, for first time, that these objects reside with mass $\log M_{\rm halo} = 12.98_{-0.22}^{+0.17} [h^{-1} M_\odot]$ ($12.28_{-0.19}^{+0.13}$) at low $z \sim 0.7$ (high 1.8$) redshifts. irrespective an increase bias is slower than expectation constant halo instead follows growth rate halos, known passive evolution track. implies those driven by galaxies across cosmic time.