A radial plot of the average gas-to-dust mass ratio along the major axis of Cen A with a position angle of 30° north of west. We measured the average gas-to-dust mass ratio value within 20 bins along this position angle, each measuring 2 × 0.5 arcmin² in size. The red data points represent the bins in which we had at most 10 good pixels out of a possible 25, and therefore are not as well sampled as those shown in black.