Title:  
         Dark Matter in the Draco and Ursa Minor Dwarf Spheroidals


Jan Kleyna
University of Cambridge




Abstract:
 
The Local Group dwarf spheroidal galaxies (dSphs) appear to be among the
most dark matter dominated systems known, some having a mass to light
ratio M/L>100. Stars moving inside a dSph are essentially tracers of a
pure dark matter potential, and dSph stellar kinematics provides a
unique window to study the shape of very low mass dark haloes. In this
talk, we present recent multifiber velocity measurements of giant stars
inside the Draco and Ursa Minor dSphs, and discuss the implications for
their halo mass and shape (cusp vs. core).