Fig. 14
Ratio I70/100 computed for the Compiègne et al. (2011) dust model (red lines) and for the Draine & Li (2007) dust model (blue lines). The gas proton density is kept constant at nH = 10-3 cm-3, the solid lines represent the case of the absence of collisional heating and destruction, while the dotted lines and the dashed lines correspond to a gas temperature of Tgas = 107 K and Tgas = 108 K respectively.
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