Top to bottom: Density, temperature, and chemical profiles within the core of a 7.7 M_⊙ model at the onset of the super-AGB phase. In the bottom panel, lines represent the mass fractions of ⁴He (green), ¹²C (black), ¹⁶O (red), ²⁰Ne (blue), and ²⁴Mg (magenta). No ALP production has been included in this model. We note that it is only above 0.85 M_⊙ that C burning has been active. This model represents an example of hybrid WD progenitors.