Properties of the He layer burning on the surface of WD in the plane of WD mass and accretion rate, in which we set L_acc = L_Edd. The red solid lines are the results of our simulations, whereas the blue dotted line and the black dashed line are taken from Nomoto (1982) and Piersanti et al. (2014), respectively. The Eddington accretion rate Ṁ_Edd in this case is much higher than the values of Ṁ_RG. We note that Piersanti et al. (2014) did not present the Eddington accretion rate in their paper.