Dynamical masses of early-type galaxies at z~2
  The evolution of masses and sizes of passive (early-type) galaxies with
redshift provides ideal constraints to galaxy formation models. These
parameters can in principle be obtained for large galaxy samples from
multi-band photometry alone. However the accuracy of photometric masses is
limited by the non-universality of the IMF. Galaxy sizes can be biased at high
redshift due to the inferior quality of the imaging data. Both problems can be
avoided using galaxy dynamics, and in particular by measuring the galaxies
stellar velocity dispersion. Here we provide an overview of the efforts in this
direction.
