Proper Motions in the Local Groupby Andreas Brunthaler (Max Planck, Bonn, Germany)Key and still largely missing parameters for measuring the mass content and distribution of the Local Group are the proper motion vectors of its member galaxies. The problem when trying to derive the gravitational potential of the Local Group is that usually only radial velocities are known, and hence statistical approaches have to be used. The expected proper motions for galaxies within the Local Group, ranging from 20 to 100 muas/yr, are detectable with VLBI using the phase-referencing technique. I will present first epoch phase-referencing observations of bright masers in IC10 and M33 with respect to background quasars. |