Fig. 2
Top: growth curve of f(Hα)/f(Hβ) normalized to f(Hα)/f(Hβ) at 2.5R50, x(αβ,2p5), as a function of the radius of the aperture. Lines and colors as in Fig. 1. For one of the galaxies the Hβ emission line was not detected in all apertures and was not included. Bottom: same as top panel restricted to galaxies with EW(Hα) ≤ 16.91 Å.
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