Fig. 2

Upper: abundance maps of HNC, HCN, and HCNH+ and electrons, the two main reactants for HNC and HCN formation. Abundance values are relative to ngas = 2n(H2) + n(H). Lower: gas number density maps of HNC, HCN, HCNH+ and electrons. Data are shown for the fiducial model of a 10−2 M⊙ disk with ψ = 0.2, hc = 0.1 surrounding a T Tauri star.
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