a) Radial speed of the CME and the type II exciter. Solid line: type II exciter from Eq. (3). Symbols: radial component of the expansion CME speed on the south-eastern flank. The dashed line: quadratic fit of these points. The gray band shows the ±10% uncertainty of the type II exciter speed. b) Height profile of the angle between the normal to the CME front and the radial direction. Symbols: angles inferred from the CME modeling. Inclined solid line: linear fit of the points around the reference height r_o. Vertical solid line: corresponding angle at the reference height r_o = 2.1 R_⊙. The gray band presents the uncertainty of the height owing to the type II exciter speed.