Fig. 12

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Azimuthally averaged radial profiles of [C I], HCN, CN, C2H, and NO for models with a high C/O ratio of 1.01 in the regions indicated by the horizontal pink and purple bars in the top right panel and the fiducial C/O ratio of 0.4 in the other disk regions. The background UV field is reduced by a factor of ten in these models. The pink model has a high C/O in two ten au wide rings at the observed ring location and the purple model has an increased C/O across the entire width of both dust rings.
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