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  • Kinematical studies of AGN have been generally focused on the gaseous component (ionised or mollecular gas). 
  • These studies have the potential of revealing the dynamical forces that work on the gas closer to the active nucleus, but they can not trace the gravitational potential. 
  • Moreover, the gas represents only a fraction of the total mass of the galaxy and could be driven by non- gravitational perturbations.
  • We also need to study the kinematical stellar behaviour. The comparison of stellar and gas velocity field may reveal if kinematical perturbations are related to the presence of the activity and/or to other mechanisms (interactions, mergers, bars...).