Latitudinal distributions of the visible-light pB (top panel) and H I Lyα intensity (bottom panel) at 4.0 and 6.0 R_⊙, derived from the maps shown in Fig. 3. The latitude is expressed in terms of the polar angle, measured counterclockwise from the north pole. In the bottom panel, the horizontal dashed blue lines mark the expected range of the H I Lyα interplanetary emission (3 − 6 × 10⁷ photons s⁻¹ cm⁻² sr⁻¹; see, e.g., Kohl et al. 1997; Akinari 2007).