Analysis of the guiding space of the N-body model. Top row: unsharp-masked stellar density distribution in the N-body simulation (a) and the mean radial velocity map (b) in the (R_g,ϕ)-plane. Middle row: zoomed maps of the rectangular region indicated in the top row: density perturbation (c), and the mean radial velocity map (d). Bottom row: density (e) and the mean radial velocity (f) in the (R, v_ϕ) coordinates for all stars in a narrow azimuthal strip, indicated by the dashed lines in the top and middle rows.