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Table 3.

Median properties of the matched AGN subsets used to investigate the dependence of environment on black-hole mass.

Subset N ⟨z⟩ ⟨log sSFR⟩ ⟨log SFR⟩ ⟨log M★⟩ ⟨log LX⟩ log(MBH/M⊙) ⟨log λEdd⟩ bAGN log MDMH
low–LX, low–MBH 62 0.66 −0.15 1.64 10.89 43.64 8.01 −1.39 1.75 ± 0.40 13.10 ± 0.42
low–LX, high–MBH 62 0.83 −0.20 1.75 10.96 43.80 8.48 −1.52 1.62 ± 0.50 12.70 ± 0.65
high–LX, low–MBH 51 0.89 +0.02 1.98 10.93 44.19 8.43 −1.32 2.33 ± 0.35 13.29 ± 0.24
high–LX, high–MBH 51 0.97 +0.03 1.98 11.09 44.24 8.84 −1.53 2.66 ± 0.20 13.39 ± 0.11
all–LX, low–MBH 123 0.71 −0.14 1.75 10.89 43.85 8.17 −1.43 1.92 ± 0.22 13.18 ± 0.20
all–LX, high–MBH 123 0.93 −0.13 1.94 11.13 44.11 8.62 −1.69 2.02 ± 0.30 13.03 ± 0.29

Notes. Median values of sSFR, SFR, stellar mass (M★), X-ray luminosity (LX), redshift (z), black-hole mass (MBH), Eddington ratio (λEdd), the AGN linear bias parameter (bAGN), and the inferred DMH mass (MDMH) for the matched AGN subsets. The bias parameter was derived from the AGN–galaxy cross-correlation analysis, and halo masses were obtained by converting bAGN to MDMH using the Sheth–Tormen formalism assuming σ8 = 0.811. For the four subsamples split simultaneously into luminosity and black-hole mass, ‘low–high’ divisions correspond to log LX ≤ 44 and log MBH ≤ 8.3 (low) versus log LX > 44 and log MBH > 8.6 (high). For the ‘all–LX’ rows, the samples are divided using a single black-hole mass threshold at log(MBH/M⊙) = 8.5.

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