Discovery of two nearby post-T Tauri stellar associations
  In this work we report the discovery of 2 new stellar associations in close
vicinity of the Sun at roughly 180 and 150 pc. These two associations, named as
u Tau assoc and e Tau assoc, were detected based on their clustering in a
multi-dimensional parameter space including ${\alpha}$, ${\delta}$,
${\mu}_{\alpha}$ , ${\mu}_{\delta}$ and ${\pi}$ of Gaia. The fitting of
pre-main-sequence model isochrones in their color-magnitude diagrams suggests
that the two associations are of about 50 Myr old and the group members lower
than ${\sim}$0.8 $M_{\odot}$ are at the stage of post-T Tauri.
