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Fig. 8


Top: radial abundance profile of CO (red) and H2O (blue) in the spherical envelope models with passive heating only. Bottom: abundance profiles along the cavity wall (Eq. (2)) in the 2D models, with all effects of the UV field included: photodissociation, photodesorption, and altered chemistry due to heating of the gas and dust. Shocks are not included in either panel.

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