Corpus ID: 118457449

Diffusion in barred-spiral galaxies

  title={Diffusion in barred-spiral galaxies},
  author={Maria Teresa Brunetti and Cristina Chiappini and Daniel HuberDaniel Pfenniger},
  journal={arXiv: Astrophysics of Galaxies},
We characterize the radial migration of stars in the disk plane by calculating the diffusion coefficient and the diffusion time-scale for a bulge-disk N-body self-consistent system with a marginally-stable Toomre-Q parameter. We find that diffusion is not constant in time, but follows the evolution of the bar, and becomes maximum near the corotation region and in the external disk region, where asymmetric patterns develop. 

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