Proton density distribution in the orbital plane of the whole simulated domain for the run computed considering the weak stellar wind and a planetary magnetic field of 1 G (i.e. model N3 in Table 3). The planet is at the centre of coordinate (0,0) and moves counter-clockwise relative the star, which is located at (76,0). Proton fluid streamlines originating from the planet (black) and from the star (grey) are shown. The axes are scaled in planetary radii.