Doppler Tomography. Upper panel: Doppler tomograms for Hβ, Hγ, and He IIλ4686 in standard projection. Lower panel: same as upper panel, but in inside-out projection. Closed dashed line and closed continuous lines are velocities of primary and secondary Roche lobes, respectively. The green line is the trace of ballistic stream in velocity space. The red lines are velocities of a gas stream at three dipole lines.