Multiwavelength Spectral Energy Distribution Analysis of X-Ray Selected Active Galactic Nuclei at z=0.2-0.8 in the Stripe 82 Region

We perform a systematic, multiwavelength spectral energy distribution(SED)analysis of X-ray detected active galactic nuclei(AGNs)atz=0.2-0.8 with Sloan Digital Sky Survey(SDSS)counterparts in the Stripe 82 region, consisting of 60 type 1 and 137 type 2 AGNs covering a 2-10 keV luminosity range of 41.6 < log L-x < 44.7x<<. The latest CIGAL Ecode, where dusty polar components are included, is employed. To obtain reliable host and AGN parameters in type 1 AGNs, we utilize the image-decomposed optical SEDs of host galaxies by Li et al. based on the Subaru Hyper-Suprime Cam images. The mean ratio of black hole masses(M-BH)and stellar masses(M-stellar)of our X-ray detected type 1 AGN sample, log(M-BH/M (stellar)) =-2.7 0.5BH is close to the local relation between BH and stellar masses as reported by Li et al. for SDSS quasars. This ratio is slightly lower than that found for more luminous (logL(bol)>45)type 1 AGNs at z similar to 1.5. This can be explained by the AGN luminosity dependence of log(M-BH/M-stellar), which little evolves with redshift. We confirm the trend that the UV-to-X-ray slope(alpha(OX))or X-ray-to-bolometric correction factor(kappa(2-10))increases with AGN luminosity or Eddington ratio. We find that type1 and type 2 AGNs with the same luminosity ranges share similar host stellar mass distributions, whereas type 2stend to show smaller AGN luminosities than type 1s. This supports the luminosity-dependent(or Eddington-ratio-dependent)unified scheme.