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The Interplay between Bars and Dark Matter Halos

  • Kelly Holley-Bockelmann
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 319)

Abstract

The evolution of a stellar bar transforms both the galaxy disk and its 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 predicted by linear perturbation theory. The bar lengthens and slows as it loses angular momentum, a process that occurs even in rather warm disks.

Keywords

galaxies: spiral galaxies: kinematics and dynamics galaxies: structure methods: n-body simulations 

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Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • Kelly Holley-Bockelmann
    • 1
  1. 1.University of MassachusettsUSA

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