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Fig. 7

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Non-LTE diagnostic diagram of the [FeII] emission for collisions with electrons created with RADEX. The temperature-sensitive 26/18 μm ratio (solid lines) is plotted against the electron density-sensitive 35/26 μm ratio (dashed lines). The observed ratios (filled circles with error bars) indicate T ~ 1000 K and ne ~ 105−106 cm-3.

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