Toomre diagram (left panels) and azimuthal action vs. eccentricity (right panels) of single white dwarfs (top panels) and common proper motion pairs (bottom panels). The velocity components are in the rotating rest frame. Colors and symbols are the same as in Fig. 6. The quantiles of the error bar distributions are also plotted for the isolated white dwarfs. The dashed curves in the Toomre diagrams (left panels) are circles with diameters of 100, 200, and 300 km s⁻¹.