Diffusion in barred-spiral galaxies

Details Diffusion in barred-spiral galaxies Diffusion in barred-spiral galaxies

2010-12-03

arxiv.org/abs/1012.1160v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

9 pages, 7 figures, submitted to Astron. Astrophys. Trans., talk presented to `Dynamics and Evolution of Disc Galaxies', Mosco

Scientific paper

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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