Gasand stellar rotation curves. The coloured lines show fitted gas (combined [NII] and Hα) rotation curves assuming three different disk inclinations (solid blue: i = 14°; dash-dotted green: i = 16°; dashed red: i = 20°). The two thin grey lines with error bars indicate the individual [NII] and Hα rotation curves. The dashed black line shows the fitted stellar rotation curve (i = 14°). The thin dashed black horizontal line indicates the rotation speed expected from the inverse Tully-Fisher relation. The broad vertical line indicates the ring radius (R = 9. ′′ 0; Comerón et al. 2010).
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