Fig. 1

From left to right: evolution with time of gas (upper panels) and stars (middle and lower panels) during a minor merger between a gSb and a dSb galaxy on a direct orbit (gSbdSb01dir33). The stellar component is separated into new stars (formed during the interaction, middle row of panels), and old stars (those already present in the galaxies before the interaction, lower panels). In this projection the disk of the primary galaxy is viewed edge-on.
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