$^{58}$Ni, and radioactive $^{56}$Ni (which decays into $^{56}$Fe). In the case of even stronger electron capture reactions, the main products are $^{50}$Ti, $^{54}$Cr, and $^{58}$Fe (e.g., Thielemann et al. 2004).

Following the expansion of the WD, the deflagration proceeds progressively at the lower density. At $T_{{\rm max}, 9} 
\sim 5 - 6$ and $\rho_{\rm max} \sim 5 \times 10^{7} - 10^{8}$ g cm$^{-3}$, NSE still applies. The electron captures are no longer important, and thus the initial $Y_{\rm e}$ is virtually preserved. The dominant species are $^{56}$Ni and $^{58}$Ni.

In contrast to spherically-symmetric delayed detonation models, the detonation in our two-dimensional setups is triggered at certain spots at the flame front, but at other locations, deflagration burning can still proceed for some while. It is characterized by successively lower temperature and density. At $T_{{\rm max}, 9} \sim 3 - 5$, oxygen burning or incomplete silicon burning is a result, leaving mainly intermediate-mass-elements (IME) such as $^{28}$Si and $^{32}$S. At $T_{{\rm max}, 9} \sim 2 - 3$, carbon burning or neon burning is a result, characterized by abundant $^{16}$O and $^{24}$Mg in consumption of $^{12}$C. At even lower temperatures ($T_{{\rm max}, 9} \lsim 2$), virtually no major thermonuclear reactions take place.

