ℓ = 1 forward period-spacing of g modes versus periods (upper left-hand panel), and the forward frequency-spacing of radial modes (hollow small circles) and p modes (filled small circles) versus frequencies (upper right-hand panel) and the associated oscillation kinetic energy distributions (lower panels) for the ELM WD template model with M_∗ = 0.1554 M_⊙ and T_eff ~ 9600 K. The red horizontal lines in the upper panels correspond to the asymptotic period-spacing (left), computed with Eq. (7), and the asymptotic frequency-spacing (right), computed with Eq. (13).