Systematic Study of AGN Clumpy Tori with Broadband X-ray Spectroscopy:
  Updated Unified Picture of AGN Structure
  We present the results of a systematic, broadband X-ray spectral analysis of
nearby active galactic nuclei (AGNs) with the X-ray clumpy torus model
(XCLUMPY; Tanimoto et al. 2019). By adding 16 AGNs newly analyzed in this
paper, we study total 28 AGNs including unabsorbed and absorbed AGNs taken from
Ichikawa et al. (2015) and Garc\'ia-Bernete et al. (2019). This is the largest
sample whose X-ray and infrared spectra are analyzed by the clumpy torus models
XCLUMPY and CLUMPY (Nenkova et al. 2008), respectively. The relation between
the Eddington ratio and the torus covering factor determined from the X-ray
torus parameters of each object follows the trend found by Ricci et al. (2017)
based on a statistical analysis. We confirm the results by Tanimoto et al.
(2020) that (1) the torus angular widths determined by the infrared data are
larger than those by the X-ray data and that (2) the ratios of the hydrogen
column density to V-band extinction ($N_{\rm H}/A_{\rm V}$) along the line of
sight in obscured AGNs are similar to the Galactic value on average. Unobscured
AGNs show apparently smaller line-of-sight $N_{\rm H}/A_{\rm V}$ ratios than
the Galactic one. Our findings can be well explained by an updated unified
picture of AGN structure including a dusty torus, dusty polar outflows, and
dust-free gas, where the inclination determines the X-ray and optical
classifications and observed torus properties in the X-ray and infrared bands.
