Radial distribution of the amplitudes (top) and phases (bottom) of the non-axisymmetric perturbations in each Fourier component (m = 1 to 4). Q_T represents the total perturbation curve in the potential for the data set of N4303 (b). This plot illustrates the typical potential component curves obtained in the sample. The maximum values of the Q₂ and Q_T curves are shown in Table 3.