Doppler tomograph of BD+46°442  in Hα (left) and the corresponding accretion geometry (right). The map is overplotted with the velocity coordinates of the model for inclination angles of 60° (top left) and 80° (bottom left). The curves shown are similar as for Fig. 15. The points marked on the ballistic trajectory in the geometrical image correspond to the points marked on the curve representing the ballistic trajectory of the gas stream in the Doppler map. The four circles on the Doppler map represent, from outside to inside, a projected Keplerian velocity of 150, 100, 75, and 50 km s^-1, respectively. These correspond to the four circles on the geometrical image.