DELVING INTO X-RAY OBSCURATION OF TYPE 2 AGN, NEAR AND FAR

摘要

Using self-consistent, physically motivated models, we investigate the X-ray obscuration in 19 Type?2 [O?III] 5007 ? selected active galactic nuclei (AGNs), 9 of which are local Seyfert 2 galaxies and 10 of which are Type?2 quasar candidates. We derive reliable line-of-sight and global column densities for these objects, which is the first time this has been reported for an AGN sample; four AGNs have significantly different global and line-of-sight column densities. Five sources are heavily obscured to Compton-thick. We comment on interesting sources revealed by our spectral modeling, including a candidate "naked" Sy2. After correcting for absorption, we find that the ratio of the rest-frame, 2-10?keV luminosity (L 2-10 keV, in) to L [O III] is 1.54?± 0.49?dex which is essentially identical to the mean Type?1 AGN value. The Fe?Kα luminosity is significantly correlated with L [O III] but with substantial scatter. Finally, we do not find a trend between L 2-10 keV, in and global or line-of-sight column density, between column density and redshift, between column density and scattering fraction, or between scattering fraction and redshift.