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Fig. B.3.

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Same as Fig. B.1, but for the [NII]λλ6548, 6583 doublet. The intensity maps show the sum of the two lines of the doublet, while the kinematics are assumed to be the same between the two lines. The [NII] emission is fitted together with the blended Hα line (Fig. B.1) to properly separate their kinematics.
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