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Fig. B.4


H2O ice (top) and HDO ice (middle) abundances in the fluid parcels that are located in the disk at t = tacc as functions of the normalized UV fluence in the model with a low core rotation rate (Ω = 10-14 s-1). The bottom panel shows HDO/H2O ice ratio (black), D2O/H2O ice ratio (light gray), and the ratio of D2O/HDO to HDO/H2O ice ratio (gray). Only the fluid parcels in which the H2O ice abundance is larger than 10-5 are plotted. The blue and red dashed lines depict the expected H2O (or HDO) ice abundance when only photodesorption is an allowed chemical process and when only photodissociation/photodesorption are included, respectively.

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