 ![Richardson number (color) and density contours in the equatorial plane for the $q=0.0$ SPH simulation (left panel) and the $q=0.0$ SPH simulation (right panel). Black color indicates $R_i \geq 0.0$. The snapshots are taken shortly before the final disruption of the donor. The dashed line indicates the boundary of the CO core in the hybrid accretor, which has a radius of $0.0\times00^0~{\rm cm}$ in the $q=0.0$ simulation and a radius of $0.0\times00^0~{\rm cm}$ in the $q=0.0$ simulation. The radius of the CO core remains reasonably constant in both simulations. The axes are in centimeters.[]{data-label="richardsonnumber"}](f00