Reinhard Genzel
MPE

The central dark mass in the Milky Way

High resolution infrared imaging and spectroscopy have given in the
past five years very valuable new information on the properties
and dynamics of the central star cluster of the Milky Way. A review 
is given what these observations tell us about character and evolution 
of the cluster, and in particular about the stellar dynamics. It is
shown that the measured stellar radial and proper motions make a very 
strong case for a two million solar mass central black hole associated 
with the compact radio source SgrA*.