Spatial density of PM-selected PMS stars. The top axis color bar indicates stellar density in units of stars per square degree. Pixels with densities above the color-scale maximum are shown in white. The large red dashed rectangles indicate the boundaries of the USC, UCL, and LCC regions, after de Zeeuw et al. (1999) and Preibisch & Mamajek (2008). Black dots indicate members after de Zeeuw et al. (1999). Positions of known star-forming regions from Mellinger (2008) and of the open cluster IC 2602 are indicated with labeled small circles. The dense cluster around V1062 Sco is labeled UCL-1. This and the other small clusters UCL-2, UCL-3, LCC-1, as well as IC 2602 and the Lupus III condensation are indicated by dashed rectangles.
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