Fig. 8.
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Distribution of the [OI] 145μm/[OI] 63μm and [OI] 63μm/[CII] 158μm line ratios for different values of [OI] 145μm/[CII] 158μm, as shown in the colorbar. The colored region represents the outcome of the PDR DESPOTIC computations assuming homogeneous clouds with 102 ≤ nH/cm−3 ≤ 106 and 20 ≤ T/K ≤ 104. Our simulated z ≃ 6 galaxies are shown as circles, J2054-0005 as a star, W2246-0526 as a plus and the SPT0346−52 upper limit as a diamond. The black arrow illustrates the typical shift due to [OI] 63μm foreground self-absorption.
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