The Pleiades moving group: Substructures and evolution

We analyse here the spatial and kinematic evolution of the Pleiades moving group substructures found in Asiain et al. (1999). This allows us to invest igate both the birthplaces and kinematic ages of these substructures. We al so study the possibility that stellar complexes are the progenitors of movi ng groups. Our main tools are the epicycle theory and the integration of th e equations of motion using a realistic gravitational potential of the Gala xy. The disc heating effect is implemented in our algorithm to determine st ellar trajectories in order to study the disruption of unbound stellar syst ems.