Example for structures identified by DisPerSe (left), FilFinder (middle), and MST applied to fragments from astrodendro (right). The background shows the column density map of M4 at t = 2.7 Myr along the z axis, ranging between 1018 to 1024 cm−2. The purple dots represent the position of cores identifiedby astrodendro. The white lines illustrate filamentary structures found by the three filament finders, applying a column density cut at Nth = 1.5 × 1021 cm−2.
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