VELOCITY DISPERSIONS AND METALLICITIES OF 18 S0 E GALAXIES - SYNTHETIC MG-I TRIPLET LINES IN OLD COMPOSITE SYSTEMS/

Velocity dispersions and Mg2 indices were measured from CCD spectra of 13 box-shaped galaxies and 5 ellipticals. Evidences for a different r elation between velocity dispersion and metallicity, relative to ellip ticals, was found for our SO sample; we attribute this difference to t he SO disk component, affecting both the mean velocity dispersion and mean metallicity. In a tentative to reproduce the integrated bulge spe ctra of our sample galaxies, we have built composite spectra using a g rid of synthetic spectra, where the basic parameters were assumed to b e similar to those of galactic bulge globular clusters.