Fig. C.1.

Local SFR (in arbitrary units) as a function of the volume density ρ. Upper panel: unperturbed simulation after 0.5 Gyr. Middle panel: simulation 19 at impact. Lower panel: simulation 19 20 Myr after impact. Solid lines show linear regressions. The slope of the correlation
for the unperturbed galaxy simulation is n = 1.4, whereas it is n = 1.6 for the Taffy simulation.
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