Fig. 7.

The hybrid model proton x-velocity magnitude [km/s] for two different upstream solar wind conditions (labeled before and after), compared to WIND observations. Otherwise similar to Fig. 6. The reason that the WIND velocity is double valued in the center of the wake is that the velocity of the two proton beams refilling the wake from each side is computed separately, as explained in the original publication (Ogilvie et al., 1996).