Fig. 4
Surface stellar density versus the distance to the PMS cluster center for the TC (left), the OHC (middle), and OMC1-S (right). The different colors and dashed lines show different extinction ranges: green corresponds to log NH < 22.0 cm-2, blue indicates an extinction range of 22.0 cm-2 < log NH < 22.5 cm-2, and red corresponds to log NH > 22.5 cm-2.
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