Cluster distribution in the X-Y plane as projected on the GP. The filled circles, open circles, and crosses represent YOCs, IOCs, and OOCs, respectively. The asterisk at the center shows the position of the Sun, and concentric circles are drawn at an equal distance of 500 pc. The large dark circle represents the solar circle with a radius of 8 kpc, and the arrow indicates the direction to the Galactic center.
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