Panel a) total density of broad (dashed) and narrow neutrals (dot-dashed) and the sum of the two (solid line). The thin lines show the Balmer emission of narrow (dashed) and broad (dot-dashed) components (the first divided by 3). Panel b) density of the partial component of broad neutrals normalized to the total density of broad neutrals, for k = 1 to 6. Panel c) bulk speed of the partial component of broad neutrals normalized to the bulk speed of ions. Panel d) thermal speed of the partial component of broad neutrals normalized to the thermal speed of ions. The labels in panel c) also refer to panels b) and d).