Comparison of observed and simulated (model M3L34A) rotation curves. The blue points are from Sancisi & van Albada (1987) and are based on HI observations. Black solid points are from Hα and NII observations by Miller & Rubin (1995), including near the central regions. Solid line shows the prediction from the mass model , red points are direct measurements from the gas kinematics within ± 1.5 kpc from the disc plane.
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