Fig. 5.— Graphs of the rotation curves for representative models of each scenario. Red identifies the H β points, purple identifies the H I data and blue represents the stellar rotation points as in Fig. 3. Green is the stellar model circular velocity curve while black represents the circular velocity curve. The orange curves show the rotation curve breakdown by component: halo (solid), disc (dashed) and bulge (dotted). The scenario K and KG rotation curves display a kink in the black curve at ∼ 0 . 2 kpc, owing to the inner truncation. 39