Fig. 2.
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Comparison between the UCLCHEM and UCL_PDR results for a cloud of sinusoidally varying density. Upper: gas (black) and dust (blue) temperature against Av. Lower: fractional abundance against Av. In both plots, results from UCLCHEM are plotted as solid lines and equivalent values from UCL_PDR are plotted with dashed lines in the same colour.
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