Variations of the gas circularity parameter ϵ_g with respect to the radial distance r and color coded according to the global gas metallicity at z = 0.33 (&#Xtextcircled;g). The gas in the satellite has a metallicy of log(Z/Z_⊙) ∼ –0.85 (green) which is consistent with the metalicity of young stars displayed in Fig. A.2 (second line – fourth column). Then some of the gas of the satellite is accreted by G70 and is progressively enriched in metal as the radial distance decreases due to supernovae activity dominated by young stars in the central part. Consequently, the accreted gas reaches the galactic plane with a much higher metallicy and then forms stars that inherit the same high metallicity, consistent with trends found in Fig. A.2 at the same epoch.