On-sky spatial distribution of cluster members. For each cluster star, PM vectors are shown overplotted on the RGB image of the region from the allWISE survey. We mapped the W3 band in red, W2 in green, and W1 in blue. The W3 filter mainly traces small grain dust and polycyclic aromatic hydrocarbon emissions, whereas the W1 and W2 filters are dominated by young stars (Wright et al. 2010). The best-fit ellipses of the spatial distributions are shown in gold.