Rotation curve fits. Left panel: Burkert halo, middle: unconstrained NFW halo; right panel: NFW halo using the c − M_vir relation. The points with errorbars represent the combined Hα+Hi rotation curve. The short dashed, long dashed, dotted, and dot-dashed curves represent the gas, halo, stellar disk, and bulge contributions, respectively. The total (best) fit to the rotation curve for a particular model is represented by a solid line.