Redshift-luminosity characterization of AGN galaxies having obscuring dusty materials using the SED from the X-ray to far-infrared


 The spectral energy distribution (SED) from X-ray to FIR is used to characterize AGNs having obscuring dusty materials. Samples of 73 AGNs, with redshifts of z < 2.5, are subdivided based on their optical spectra into subgroups of type 1 and 2 AGNs and no-AGN. The X-CIGALE code was used to produce SEDs of these galaxies, fitting them with their observed flux densities. Accordingly, this code provides estimates of the physical properties, including the stellar mass, dust-to-gas mass ratio, FUV attenuation, star formation rate, and luminosity. All these properties and luminosity components, including stellar, AGN, X-ray and dust luminosities, are characterized versus the redshift. With the caveat that our sample is flux-limited and thus is affected by the Malmquist bias, the results show that these properties increase as a function of the redshift with various variation rates of each galaxy group except the FUV attenuation of type 1 AGN which shows a slight reduction with the redshift. Both stellar, AGN, and X-ray luminosities show tight correlations with the intrinsic AGN luminosity, which are, in principle, attributed to the intrinsic AGN accretion power acting as a fueling source. This power has an impact on most other correlations versus the redshift when the intrinsic AGN luminosity increases with the redshift. Due to their different emission sources, these luminosities have different fractional contributions to the total luminosity. The stellar luminosity, in which the dust luminosity is more effective, has the highest contribution of all galaxy groups, while the AGN luminosity has the lowest.