Positions of all VT-selected PMS Sco OB2 members in Galactic XYZ coordinates. Panel a: smoothed distribution in the XY plane; unlike other panels, also Upper-MS stars are included. The Sun lies at (Y, X) = (0, 0). The directions of the Galactic center and rotation are indicated with arrows. Panels b,c,d: spatial distributions of PMS members, projected onto the YX, YZ, and XZ planes, respectively, with no smoothing applied. Density is maximum for yellow color and minimum (nonzero) for blue; white indicates zero density.
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