Top and bottom: SFR and clumpiness (respectively) are shown as a function of time for the direct-direct (i.e., prograde-prograde) merger (in blue), retrograde-retrograde merger (in orange) and for the fiducial run of an isolated galaxy multiplied by two (in black). In the latter, only the evolution during 200 Myr is shown as a representative case, while in the other two runs the time range considered (∼450–∼820 Myr from the onset of the simulation) encompasses the effective merging period, from the first pericenter passage to the final coalescence (vertical dashed lines colored accordingly).
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