Proper motion of the Sgr stream from the Gaia data and comparison with the LM10 model (part 2). Top, middle, and bottom panels: organized as in Fig. 2. (a) Proper motions of the peaks finally selected to belong to the Sgr stream colored with blue (trailing) and orange (leading). A smooth version of the median proper motion of the Gaia DR2 stars belonging to the detected peaks (see text) is shown in blue and red, together with the model in black. The green lines indicate the geometric filters that we apply to select the peaks that belong to the main sequences. (b) Differences in the median proper motions between data and model with the shaded areas indicating the statistical error. The rest of the curves indicate the values of a potential discrepancy due to an inappropriate assumption of the solar motion values in LM10 by 20 km s⁻¹ (see text).