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tokens: for our purpose. The electron screening effect is negligibly small in the region of ρ = 10 6 –10 7 g cm −3 and T > 2 × 10 9 K, where carbon detonation would occur, so we do not include this effect. Figure 7 shows the comparison between simulations with and without carbon burning for the case of . The red lines indicate the case with carbon burning, while the black ones indicate the case without. Although the orbital evolution (Figure 7 (a)) is almost the same, the maximum temperature (Figure 7 (c)) realized in the case with carbon burning is higher than the case without during the merger phase. This difference comes from the nuclear energy release (Figure 7 (b)). We confirmed that the inclusion of carbon burning increases the maximum temperature. Figure 8 summarizes the density and temperature of a particle which has the smallest τ CC / τ dyn ratio for all the cases we recalculated, including nuclear burning. The symbols surrounded by black frames are the results of the cases with carbon burning. Figure 7. Merger of WDs. The red lines indicate the case with carbon burning, while the black lines indicate the case without. (a) The orbital evolution, (b) the energy release rate of carbon burning, and (c) the time evolution of maximum temperature. Figure 8. Same as Figure 3 , but for the case with carbon burning. The symbols surrounded by black frames are the case with carbon burning while those without black franes are the case without. The black dashed line is the demarcation of the detonation condition by Seitenzahl et al. ( 2009 ). Since our simulations include only carbon burning, the effect of nuclear reactions would be underestimated. To check this effect, we perform post-processing calculations using an α -chain reaction network containing 13 species from 4 He to 56 Ni (Timmes 1999 ). Figure 9 shows the results for a particle which has the highest temperature in the case of . This calculation was done for a period in which carbon burning continued. The red lines indicate the case with the α -chain reaction network, while green lines indicate the case with only carbon burning. Because we find essentially no difference between them, our simulations including only carbon burning are appropriated to estimate the effect of nuclear burning, and being consistent with the previous studies using α -chain networks (Pakmor et al. 2010 , 2011 , 2012b ; Raskin et al. 2012 ), at least until the initiation of detonation. Figure 9. Post-processing analysis in the case of . We have calculated nuclear energy generation using the 13 species α -chain reaction network (Timmes 1999 ). Green lines denote the case of only carbon burning while the red lines indicate those of post-processing results. (a) Density, (b) temperature, (c) specific internal energy, and (d) pressure. Thus, the inclusion of carbon burning lowers q cr to realize violent merger-induced explosions if we use the same criterion as in Section 3.2 . In Figure 10 (a), the green triangles are the