THE DYNAMICS OF SO GALAXIES

摘要

We investigate the detailed dynamical properties of a sample of disc-dominated SO galaxies, with a view to understanding their formation, evolution and structure. By using long-slit spectra of edge-on systems along their major axis, we have derived an estimation of the phase density of their stars and the approximate form of their gravitational potentials. Using their asymptotic rotation speeds and their absolute magnitudes, we find that these SO galaxies are systematically offset from the Tully-Fisher relation for later-type galaxies.