Some examples for x₁ and x₂ orbits found by solving for closed orbits in the rotating bar potential. The x₁ orbits are marked by dashed and dot-dashed lines, and the x₂ orbits are marked by solid and dotted lines. Gas is assumed to be moving on only a subset of these, i.e. on the orbits marked by a solid or dashed line. Orbits beyond the largest shown orbit are assumed to be circular.