Time evolution of the baryonic material in a merger model in which the two progenitors are gSd galaxies (experiment gSdgSdo23). Time is given in the bottom left corner of each frame. At each snapshot, the view is centred on progenitor 1 with θ = 45° and φ = 90°, assuming the original coordinates system of the GalMer simulation. Particles belonging to different galaxy components in the two merging galaxies are coded with different colours according to the legend in the panels. The label “Star total” refers to the collisionless stellar content of each progenitor (i.e. the “old stars”). (Color version online.)