Kinematic evolution of the young local associations and the Sco-Cen complex

During the last decade, several young stellar associations have been discovered within 100 pc of Earth (see [18] for a recent review) thanks to the crosscorrelation of the ROSAT and Hipparcos catalogues, combined with spectroscopy observations. The stars belonging to these young local associations (herafter, YLA) have ages in the range from a few to several tens of Myr. The YLA not only offer insights into the star formation process in lowdensity environments, but also have shed light on the substellar astrophysics, since tens of brown dwarfs have been identified in these associations. Furthermore, the study of the YLA can also yield important clues on the recent star formation in our vicinity and its consequences on the local ISM.