Stretched period échelle diagram for dipole gravity-dominated mixed modes. The top panel shows the work led by co-author Appourchaux with ΔΠ₁ = 76.3 s. Fitted ridges with m = {− 1, 1} are represented as red and orange crosses, respectively, while m = 0 is represented as a continuous white line. The black stripes show the location of the l = 0, 2 mode power, which has been removed for clarity. The bottom panel summarizes the findings of co-author Gehan, where peaks with a height-to-background ratio equal to or above ten are represented. The symbol size varies with the measured power spectral density. Ridges with m = {− 1, 0, 1} are represented in green, light blue, and red, respectively. Red and green crosses represent the fit of the ridges with m = ±1. The m = 0 ridge is identified by considering that it is located at the mid-point between the m = ±1 ridges.