Observed Properties of Dark Matter on Small Spatial Scales

摘要

The nature of dark matter is one of the outstanding questions of astrophysics. Theinternal motions of member stars reveal that the lowest luminosity galaxies in the Local Groupare the most dark-matter dominated. New large datasets allow one to go further, and determinesystematic properties of their dark matter haloes. We summarise recent results, emphasising thecritical role of the dwarf spheroidal galaxies in understanding both dark matter and baryonicprocesses that shape galaxy evolution.