LOW REDSHIFT BAL QSOS IN THE EIGENVECTOR 1 CONTEXT

We attempt to characterize the geometry of Broad Absorption Line (BAL) QSOs by studying a low redshift sample of 12 sources. We nd that the majority of these sources are Population A quasars as dened in Sulentic et al. (2000a, broad H FWHM 4000 km s 1 ). A possible correlation between terminal velocity and absolute V magnitude suggests that the bolometric luminosity to black hole mass ratio Lbol=MBH is a governing factor with classical BAL sources showing the highest values. Civ 1549 emission in classical BAL sources shows a prole blueshift that supports a disk wind/outo w scenario with a half opening angle of < 50 . Observation of \secondary" mini-BAL features in the Civ 1549 emission prole motivates us to model BALs with an additional component that may be involved with the BLR outo w and co-axial with the accretion disk.