Slice of the ejecta of the D⁶ explosion, annotated with its specific features. This figure was made from the output data at 50 s of the SN simulation published in Tanikawa et al. (2018), which are the input data of the SNR simulation presented in this paper. The quantity plotted is the mass density of the ejecta of the exploded primary WD. The slice is taken in the x–y plane, through the origin of the z-axis. The tail visible at the bottom (blue outline) is where the first detonation folded over on itself, on the surface of the primary WD, opposite to the ignition point. The second detonation, which destroyed the primary WD, happened near its center (red arrow). The shadow that was cast in the ejecta of the primary WD by the presence of the secondary WD is visible on the bottom left side (green outline). It has a conical shape, of half-opening angle θ. The inner part of it, along the cone axis, is contaminated with material stripped from the secondary WD. (At the scale of this plot, the two WDs can barely be distinguished, their separation is of the order of the thickness of the solid lines.) A Sketchfab-based interactive version of the D⁶ SN at 50 s is available in the online Journal. This version shows a set of isocontours of the mass density, rendered as semitransparent surfaces: four contours in the inner ejecta, at levels ranging from 8% to 1% of the maximum value from red to yellow, and two contours in the outer layers, at levels 10⁻⁴ and 10⁻⁵ in white. This view highlights the conical shadow cast by the companion WD, and also shows the tail.

An interactive version of this figure is available in the online journal.