RV convective blueshift inhibition on the RVs as a function of the rotation phase with a rising and decaying amplitude with a star inclined as in Fig. 3d. Black line: window function consisting of two exponentials, thin lines: effect of a spot without amplitude variation, bold lines: effect of the spot with varying amplitude. Colors correspond to the effect of spots at different latitudes (color code is the same as Fig. 3d). In (a) the maximum amplitude of the spot is attained on the visible hemisphere at the longitude of the observer (ϕ₀ = 0), and in (b) the maximum amplitude is attained when the spot is 180° away from the observer. The window is chosen to reproduce the fact that, on the Sun, spots appear 10-11 times faster than they vanish (Howard 1992; Javaraiah 2011).