The shape of broad-line profiles in AGN
  We present a study of the broad optical/UV emission line profiles in AGN
(active galactic nuclei) to get information on the dominant velocity components
(turbulence, rotation, etc.) in the central broad-line region (BLR). We
introduce line broadening simulations of emission line profiles and compare
these results with the largest homogeneous data set of reverberation-mapped
AGN. The underlying broad-line profiles in AGN are Lorentzian profiles caused
by turbulence in the line emitting region. The turbulent velocities are
different for the different line emitting regions of Ha, Hg, Lya, CIII] 1909,
He II 1640, and Si IV 1400. The turbulent velocities go from 400 km/s for Hb up
to 3,800 km/s for Lya+Nv 1240. The dominating broadening mechanism of these
profiles is broadening due to rotation. The rotation velocities causing the
line profile broadening go from 500 km/s up to 6,500 km/s. Here we present
interrelations between observed emission line widths (FWHM) and their related
rotational velocities to correct for the contribution of the turbulence to the
broad-line profiles.
