Velocity Dispersions of Galactic GCs Testing Gravity?

Abstract:
The velocity dispersion profiles of low-mass stellar systems are widely used to 
determine their dynamic mass-to-light ratios, and hence infer their dark matter content. 
Another regular interpretation is that any observed flattening of this profile at large radii 
is evidence for dark matter and/or alternative theories of gravitation, e.g. MOND. In this 
talk I will present comparisons of velocity dispersion profiles of several Galactic globular 
clusters and discuss their use in drawing these conclusions.