Open Access
Fig. B.1
Molecular abundances in the model with AV = 1 mag for N2H+ (top left), N2D+ (top right), HCO+ (bottom left), and DCO+ (bottom right). The colours represent the different time-steps: 104 yr (red), 5 × 104 yr (green), 105 yr (blue), 5 × 105 yr (purple), and 106 yr (black).
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