A sextet of clusters in the Vela OB2 region revealed by Gaia
  Using Gaia DR2 data, combined with OmegaCAM ground-based optical photometry
from the AD-HOC survey, and detailed Radial Velocity measurements from
ESO-Gaia, we analyse in detail a 10x5 deg region around the Wolf-Rayet star
$\gamma^2$ Vel, including the previously known clusters Gamma Vel and NGC2547.
Using clustering analysis that considers positions, proper motions and
parallax, we discover 6 clusters or associations -- 4 of which appear new.
Analysis of the colour-magnitude diagram for these clusters show that 4 of them
formed coevally from the same molecular clouds 10 Myr ago, while NGC 2547
formed together with a newly discovered cluster 30 Myr ago. This study shows
the incredible wealth of data provided by Gaia for the study of young stellar
clusters.
