Calculated vertical column densities down to the midplane of H2O, C2 H2, and HCN (left panel) and the radicals C2H and CN (right panel) as a function of radius r for the T Tauri disk. We show results from our fiducial model, a model in which a 4000 K blackbody stellar spectrum is considered, and a model in which all photodestruction rates are computed using parametric expressions (see text).
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