Disk galaxies contain a large amount of interstellar dust, which affects the
projection of kinematic quantities. We investigate in detail the effects of
dust extinction on the mean projected velocity and the projected velocity
dispersion. We use our results to construct a general strategy to determine the
dynamical structure of disk galaxies, with the aim to constrain their mass
distribution and dynamical history.Comment: to be published in the proceedings of "Galaxy Disks and Disk
Galaxies", Funes J.G. and Corsini E.M. eds., ASP Conference Serie
