The Dark Matter Halo Density Profile, Spiral Arm Morphology, and Supermassive Black Hole Mass of M33

Figure 2

The HI rotation curve from Corbelli and Salucci [16] modeled using a pseudoisothermal model (core model; blue solid line) and an NFW model (red dotted line). The squares represent the total rotation velocities, and the circles represent the contribution of the dark matter to the rotation velocities (after subtraction of the stellar and gas mass).