What about the Little Guys?
Most galaxy collisions do not
involve two big galaxies.
Most collisions involve a larger
galaxy swallowing a smaller companion.
In fact, cosmological considerations suggest that
most galaxies have experienced a ``minor merger''
in their lifetime.
- Coupling between orbital and rotational motion can
induce bars(Warning: 4.2Mb mpeg) in a disk galaxy.
- Bars can drive gas inflows and starbursts.
- Dynamical stirring heats, thickens,
and warps (Warning: 1.8Mb mpeg) the disk. (Kind of like this?)
- Stripping and accretion of companions leads to subpopulations
This is very relevant to our own Milky Way galaxy:
- The Milky Way has several nearby
- The Milky Way is currently ``eating''
the Sagittarius dwarf.
- The Milky Way is a barred galaxy.
- The Milky Way has a ``thick
Previous: Making Ellipticals
Finally: What now?