Sum C1(P1,Pmin,1) (Eq. (12)) of the 228 values of a model based on 76 g-mode dipole triplets with the splitting value s1 = 210 nHz, applied to the power spectrum of Fig. 7, smoothed over 6 bins. The two free parameters of the model are the equidistant period spacing P1, defining the abscissa, and the period Pmin,1 of the first selected mode, defining the ordinate axis. The first (lowest) sharp peak is located at 30 360 ± 15 s (FWHM) and covers the radial order range from −20 to −95, the second (upper part of the figure) covers the radial order range from −21 to −96. The equidistant period spacing is 1443 s, or 24 min 03 s, within less than 1 s.