Dynamics of Colliding Galaxies

Simulations allow us to watch galaxies collide and merge:

Galaxy Merger Animation
(Warning: 2.6 Mb mpeg)

What can we learn from them?

Galaxies merge via dynamical friction against dark matter halos

Halos ``soak up'' the orbital energy and angular momentum, essentially making galaxy collisions very sticky.

Tidal Tails can probe the structure of dark matter halos

Studies of tidal tails can constrain dark matter theories.

Previous: Computer Modeling
Next: Starburst Galaxies