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Fig. 4


Upper panel: evolution of the density of the two SPH simulations of the formation of dense cores between 4 × 107 and 5 × 107 yr (solid line for case A, dashed line for case B). Lower panel: evolution of the abundance of O (red), s-O (green), e (blue), and s-H2O (brown) for cloud A (solid lines) and cloud B (dashed lines).

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