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Fig. 5
Fractional abundances, relative to H2, of N2 and N as a function of radius. Dotted lines: McElroy et al. (2013) model, dust shielding only. Spheres, dashed and solid lines: PP model (χ = 0.5), PP model (χ = 1.0), and SS model, with full shielding (dust + self- + H + H2).
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