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Fig. 3
Total hydrogen column density for the Mdisc = 4 × 10-4M⊙, Rtaper = 7.5 AU fiducial model, illustrating that the column density of the disc begins to decrease exponentially at Rtaper, with exponent −1.0. As discussed in Sect. 2, we set the taper radius so that N⟨ H ⟩ ≈ 20 cm-2 at the outer edge of the fiducial model.
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