The heliosheath plasma profiles assumed in this study, under the assumption of a radial solar wind speed given by Eq. (9). Panel a) shows the assumed V_sw profile, with panel b) showing the resulting ∇·V_sw. Panels c) − e) show the magnetic field magnitude, solar wind density and Alfvén speed profiles, respectively. Panel f) shows the calculated momentum diffusion coefficient from Eq. (3) at a rigidity of P = 1 GV. For all cases, results are shown in the equatorial plane, and for three different assumptions of V_sw namely, the profile according to Eq. (10), incompressible flow with V_sw ∝ r^-2 and an assumed maximal decrease of V_sw ∝ r^-6. The TS is located at r_TS = 94 AU.