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Fig. 6

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F6/F5 (oH2O 321−312-to-312−303) line flux ratio as a function of τ100. The small numbers on the right side of the curves indicate the values of Tdust for each curve. The H2O column density per unit of velocity interval is NH2OV = 1015cm-2/ (km s-1) (green, blue, and magenta curves) and NH2OV = 5 × 1015cm-2/ (km s-1) (red and black curves).

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