Two-dimensional cuts of the calculated H2O gas-phase abundance relative to H nuclei in the four source models with the parameters given in Table 1 in the same order as in Fig. 1. The plotted dusty streamlines have launch radii ranging from the dust sublimation radius Rsub to 25 AU. Initial abundances at the wind base are discussed in Appendix D. The colour scale ranges from 10-6 to 10-4.
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