The Physical Properties of Low-redshift FeLoBAL Quasars. I. Spectral-synthesis Analysis of the Broad Absorption-line (BAL) Outflows Using SimBAL

We present the first systematic study of 50 low redshift ($0.66 < z 1.63$) iron low-ionization broad absorption-line quasars (FeLoBALQs) using $SimBAL$ which represents a more than five-fold increase in number FeLoBALQs with detailed absorption line spectral analyses. found outflows have wide range ionization parameters, $-4\lesssim\log U\lesssim 1.2$ and densities, $2.8\lesssim\log n\lesssim8\ \rm[cm^{-3}]$. The objects our sample showed FeLoBAL gas located at distances $0\lesssim\log R\lesssim 4.4$ [pc], although we do not find any evidence for disk winds (with $R\ll0.01$ pc) sample. outflow strength primarily depends on velocity faster that are luminous or flat redder energy distributions. $\sim18\%$ significantly powerful needed quasar feedback. Eight "overlapping troughs" spectra identified eleven "loitering outflow" objects, new class characterized by velocities high column density $\log R\lesssim1$ [pc] from central engine. FeLoBALs loitering show properties expected radiatively driven these may represent distinct population among FeLoBALQs. discuss how potential acceleration mechanisms origins differ different locations quasars.