Fig. 4
From: Pickup ion-mediated plasma physics of the outer heliosphere and very local interstellar medium
Schematic of the solar wind–LISM interaction showing the boundaries. The colored regions require a non-equilibrated multi-component plasma description. The different colors indicate that the non-equilibrated PUI component(s) originates from different physical processes. The region in white surrounding the Sun corresponds to the ionization cavity where PUIs are not present in sufficient numbers to effectively mediate the plasma. See text and Table 1 for details