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Fig. 11

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Total O2 column density as a function of Go and density (adapted from Melnick et al. 2012; Hollenbach et al. 2009) for the 8.0 km s-1 component. The horizontal grey band shows the total O2 column density range for the observed integrated intensity in the 8 km s-1 component. The vertical green band presents the range of high-G0 values required to produce this range of O2 column densities for gas densities between 103 cm-3 and 107 cm-3, whereas the orange band presents the actual G0. YH2O is the water ice photodesorption yield.

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