Mass coordinates of the point of the temperature maximum (T_max) over time (solid colored lines) of several representative systems with initial masses of 0.54 M_⊙(A), 0.82 M_⊙(B) and 1.0 M_⊙(C). The solid black line in each plot indicates the corresponding total mass of the WD (M_WD), red lines correspond to an initial luminosity of log (L_init/L_⊙) = 0 and blue lines to log (L_init/L_⊙) = −2. The dashed black line indicates the initial mass of the WD. The green dots indicate the He-ignition points. All depicted sequences were calculated with f_acc = 1.0 and Ṁ = 5 × 10^-8M_⊙/ yr. The gray arrows indicate the point of ignition in relation to M_WD. M_r,ign is the mass coordinate of the igniting shell.