The radial components of velocity and magnetic field vectors ( v _r and B _r ) together with the Alfvén speed ( v _A ) for the solutions at t = 21.5 hr (left) and 23.5 hr (right). The parameters are shown as a function of colatitude (λ = 90° − θ) for three heliocentric distances of 2.35 (solid), 2.6 (dotted), and 3.6  R _☉ (dashed).