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Fig. 10
Column density ratios of 12C/13C in HCN, HNC and CN at 1 Myr as a function of radius in the fiducial disk model. The dashed gray line marks the elemental 12C/13C ratio of 69. The shaded region indicates the 30% uncertainty assumed by Guzmán et al. (2017), whose observations probed material outto 100 au.
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