Segmented power spectra for the Polaris flare column density map. The total Fourier power spectrum shown in Fig. 4 is represented by the solid black line. The red diamonds show the power spectrum for the Gaussian self-similar part of the map. The blue triangles show the power spectrum for the non-Gaussian coherent part of the map. The black dashed line represents the fits of the curves and the green dashed line represents the CIB and contribution level of the sources. The 3D Kolmogorov power law of − 11∕3 is plotted with the red dash-dotted line.