Bar-induced evolution of dark matter cusps

  title={Bar-induced evolution of dark matter cusps},
  author={Kelly Holley-Bockelmann and Martin D Weinberg and Neal Katz},
  journal={Monthly Notices of the Royal Astronomical Society},
The evolution of a stellar bar transforms not only the galactic disc, but also the host dark matter halo. We present high-resolution, fully self-consistent N-body simulations that clearly demonstrate that dark matter halo central density cusps flatten as the bar torques the halo. This effect is independent of the bar formation mode and occurs even for rather short bars. The halo and bar evolution is mediated by resonant interactions between orbits in the halo and the bar pattern speed, as… 
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