Carbon surface density distribution in the synthetic merging system H6, each column is a projection. Top row: Green color map showing the total surface density distribution of carbon. Overplotted in orange tones is the carbon distribution in the cold gas phase (T < 5 × 10⁴ K). Bottom row: Surface density distribution of carbon once we convolve the original map with the ALPINE-ALMA PSF. Black crosses indicate each merging galaxy and in the bottom left corner is a beam of ∼1” as a reference. The x-projection in the bottom-right panel shows that it is difficult to discriminate between the two interacting galaxies.