We revisit the dependence of the covering factor (CF) of dust torus on physical properties of active galactic nuclei (AGNs) by taking into account an AGN polar dust emission. The CF is converted from a ratio of infrared (IR) luminosity contributed from AGN dust torus (L_IR_^torus^) and AGN bolometric luminosity (L_bol_), by assuming a nonlinear relation between luminosity ratio and intrinsic CF. We select 37181 type 1 quasars at z<0.7 from the Sloan Digital Sky Survey Data Release 16 quasar catalog. Their L_bol_, black hole mass (M_BH_), and Eddington ratio ({lambda}Edd) are derived by spectral fitting with QSFit. We conduct spectral energy distribution decomposition by using X-CIGALE with a clumpy torus and polar dust model to estimate L_IR_^torus^ without being affected by the contribution of stellar and AGN polar dust to IR emission. For 5752 quasars whose physical quantities are securely determined, we perform a correlation analysis on CF and (i) L_bol_, (ii) M_BH_, and (iii) {lambda}Edd. As a result, anticorrelations for CF-L_bol_, CF-M_BH_, and CF-{lambda}Edd are confirmed. We find that incorporating the AGN polar dust emission makes those anticorrelations stronger compared to those without considering it. This indicates that polar dust wind probably driven by AGN radiative pressure is one of the key components to regulate obscuring material of AGNs.

Cone search capability for table J/ApJ/912/91/catalog (A value-added catalog for SDSS DR16 (see VII/289) quasars at z<0.7)