Title:

Dark Matter and Baryons in Dwarf Spheroidal Galaxies



Rosie Wyse
JHU



Abstract:

The nature of dark matter is one of the outstanding questions of
astrophysics. The internal motions of member stars reveal that the
lowest luminosity galaxies in the Local Group are the most dark-matter
dominated. New large datasets allow one to go further, and determine
systematic properties of their dark-matter haloes. In addition, the
chemical abundances of the stars constrain star formation, gas flows
and `feedback'. I will summarize recent results, emphasising the
critical role of dwarf spheroidal galaxies in understanding both dark
matter and baryonic processes that shape galaxy evolution.