Plots of α(θ) = J_r(R₀, θ)/cρ_GJ in the parallel (panel a) and anti-parallel (panel b) configurations, for the top (top panel) and bottom (bottom panel) pulsars. The stellar distance is fixed at a = 3 R_LC. The dashed lines mark the locations of θ_pc and π − θ_pc (see Eq. (12)). The grey-shaded zones indicate the inward pole regions of emission, and the color-shaded zones mark the outward pole emission.