Rotation Curves: Cores-vs-Cusps

The following figures show photometric,mass and kinematic models for NGC3109 and NGC6822 (DDO47 comming soon)

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The following figures show the circular velocity curve(continuous black), the predicted rotatio (red) and the actual observed rotation of NGC3109 and NGC6822 (dots).

We present here a comparison of the surface density in our model and the surface brightness in k band (Waldrake et al 2003) for NGC6822.

The first figure shows the H-I intensity map for DDO47. The second figure show the comparison between the H-I isophotes and the stellar component observed in R band. Figures courtesy of Walter and Brinks (2001).