Top panel: radial variation in the amplitude of the m = 4 Fourier moment of the mean radial velocity, ⟨V_R⟩, calculated at t = 9 Gyr for the model rthick0.0, while putting the bar at different orientations (see the legend). Bottom panel: radial variation in the corresponding phase-angle (φ₄) of m = 4 Fourier moment of the mean radial velocity, ⟨V_R⟩. The points denoting the radial variation computed from the mean radial velocity, ⟨V_R⟩, while the horizontal lines denote the corresponding true bar orientation, and the shaded region around the true value denotes a 8° scatter. ‘Half-extent’ refers to the scenario where stars falling only in the negative half (x ≤ 0) are considered while computing the Fourier moments. For further details, see the text. The vertical dash-dotted black line denotes the length of the bar (R_bar = 5.75 kpc).