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Fig. 13

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N4: comparison of the distribution of various types of dust grains; left: emission of the PAHs at 8.0 μm from the PDR. Middle: emission at 24 μm of the hot grains from the ionized region (the red contours correspond to this emission). Right: emission at 70 μm from colder grains, distinct from these emitting at 24 μm, and probably situated in the PDR.

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