Le 7 février 2014
De 10h30 à 12h00
Garry ANGUS
Vrije Universiteit Brussel, Belgique
The DiskMass survey of low inclination (close to face-on) disk galaxies invokes the simultaneous measurement of stellar vertical (out of the disk plane) velocity dispersions and disk rotation speed. This combination allows us to break the degeneracy between the dark matter halo and stellar mass to light ratio. It is also an extremely strong test of alternative theories without galactic dark matter, which I will demonstrate. I also show how N-body simulations of local group dwarf galaxies can provide unique insight into their origin, survival and shapes.