Rotation curves and corresponding inner orbits for different strengths of the bulge. At the top are the rotation curves for different values of fb (see text). From left to right, the parameter fb is 3.2, 2.2, 1.2, and 0, respectively. Below are the orbits associated with each rotation curve. The blue line is the bulge contribution, the green line is the disk contribution, and the red line is the bulge + disk contribution.
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