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We present Suzaku observations of three iron low-ionization broad absorptionline quasars (FeLoBALs). We detect J1723+5553 (3\sigma) in the observed 2--10keV band, and constrain its intrinsic nh column density to nh > 6\times10^{23}\cmsq by modeling its X-ray hardness ratio. We study the broadband spectralindex, aox, between the X-ray and UV bands by combining the X-ray measurementsand the UV flux extrapolated from 2MASS magnitudes, assuming a range ofintrinsic column densities, and then comparing the aox values for the threeFeLoBALs with those from a large sample of normal quasars. We find that theFeLoBALs are consistent with the spectral energy distribution (SED) of normalquasars if the intrinsic nh column densities are nh > 7\times10^{23} \cmsq forJ0943+5417, nh > 2\times10^{24} \cmsq for J1352+4293, and 6\times10^{23} < \nh< 3\times10^{24} \cmsq for J1723+5553. At these large intrinsic columndensities, the optical depth from Thomson scattering can reach \sim6, whichwill significantly modulate the UV flux. Our results suggest that the X-rayabsorbing material is located at a different place from the UV absorbing wind,likely between the X-ray and UV emitting regions. We find a significant kineticfeedback efficiency for FeLoBALs, indicating that the outflows are an importantfeedback mechanism in quasars.

Suzaku Observations of Three FeLoBAL QSOs, SDSS J0943+5417, J1352+4239, and J1723+5553