Fig. 9
Values of the Pa5/H5 (Paβ/Hγ) in the sample. The expected value for optically thin emission is marked with a dashed horizontal line. The colour marks the Balmer decrement shape type (red:1, blue:2, green:3, purple:4) while the symbol indicates the line profile typology (circle: narrow symmetric, square: wide, cross: multi-peaked); downward triangles are upper limits.
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