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Fig. 4
Hα images extracted from the cubes. Flux is in units of 10-16 erg s-1 cm-2 Å-1. Z1 and Z2 are scaled to Z0 flux. Left: original Z0 galaxies. Middle: Z1 galaxies. Right: Z2 galaxies. North is up, east is to the left. The Hα map of NGC 628 is displayed in Fig. 5.
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