Values of Δ−Δ_exp as a function of l and D, where Δ ≡ V_T (l> 0) − V_T (l< 0) is the difference between the median transverse velocity in symmetric bins (l, d) and (−l, d), and Δ_exp = 2U_⊙sinl is the expected value for an axisymmetric model. The first two rows are for simulations with analytic models, and the last row is for N-body models. The colour scale is the same for all panels, except for models B1 and B5 that have higher values. We plot a black cross where the Δ−Δ_exp is statistically consistent with 0 with a 75% confidence, i.e. where the values of Δ are compatible with an axisymmetric model. The locations of the resonances follow the same line code as Fig. 3. The loci of the spiral arms are indicated in green and red for positive and negative l, respectively. We use the loci estimated in Roca-Fàbrega et al. (2013, 2014) for N-body models B.