Fig. 1
From: Pickup ion-mediated plasma physics of the outer heliosphere and very local interstellar medium
Left Schematic of the solar wind–VLISM boundary regions that correspond to distinguishable thermodynamic regions, and which act as neutral H sources whose characteristics are clearly distinct (after Zank et al. 2009). HTS heliospheric termination shock, HP is heliopause, BS is bow shock, \(V_\mathrm{SW}\) denotes the radial solar wind flow speed, and \(V_\mathrm{LISM}\) the LISM flow velocity. Right A 2D steady-state, 2-shock heliosphere showing, top plot, the logarithmic temperature distribution of the solar wind and interstellar plasma and, bottom plot, the density distribution of neutral hydrogen. The HTS, heliopause, and bow shock are labeled, and the wall of neutral hydrogen is identified. The solid lines of the top plot show the plasma streamlines. Distances are measured in AU