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Fig. 2

image

Influence of the radiation field hardness (silicates with a 5 nm thick mantle and carbons with a 20 nm thick mantle). The black-body with an effective temperature of 10 000 K is plotted in orange, 20 000 K in green, 30 000 K in blue, and 40 000 K in pink. The intensity of the radiation field is also varied with . In panels d), e), and f), as in Fig. 1, each of the seven lines with the same colour corresponds to a different value of G0. In panels d) and e), the lines are well separated because with the set of model parameters tested here, the recovered opacity values are not constant with G0 as can be seen in panel c). See Sect. 2.2 for description of the black and white lines and symbols.

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