On the Effects of Including Counterrotating Angular Momentum in Simulations of Galactic Disk Systems

We describe the evolution of two-dimensional disk systems constructed with signicant portions of their angular momentum counterrotating. We conrm that counterrotating angular momentum stabilizes an otherwise bar unstable disk. Further, we show that is possible to realize novel bar/disk and bar/bar congurations by varying our initial conditions. We nd that it is possible to construct models that evolve to the following congurations : two counterrotating bars, a cospatial bar and bulgelike component, and a slow counterrotating bar. We examine the possible implications of such systems and whether they might exist in nature.