Fig. A.1

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Size distributions of the dust mixtures for a-C grains from THEMIS (solid black line) and large grains (i.e Mix 1:50 from Ysard et al. 2019, dash-dotted line). Those are illustrative of our starting point since the parameters defining them are fitted (e.g. minimum and maximum sizes, slope of the power-law distributions, peak of the log-normal distributions). This figure is produced using DustEM (Compiègne et al. 2011).
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