Fig. 9
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Histograms of the last ∆ϕ (red step histogram) and of the last δϕ (red-shaded bar histogram), for class I and earlier protostars. The median values of ∆ϕ and δϕ are shown by the black dashed and dotted vertical lines, respectively. For comparison, the corresponding histograms for class II stars from Fig. 7 have been replotted here in blue.
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