Observational Determination of the Gravitational Potential 
and Pattern Speed in Strongly Barred Galaxies

Per A.B. Lindblad and Per Olof Lindblad

In: Workshop on "Galaxies and Chaos. Theory and OIbservations"
held in Ahtens in September 16 - 19, 2002, Lecture Notes in Physics


Abstract: In order to compute stellar orbits in spiral galaxies the
gravitational potential and its pattern speed must be known.
Observationally, these parameters are difficult to determine, in
particular for strongly barred galaxies.  We will briefly review different
methods and illustrate in more detail the case where the problem has been
approached by numerical gasdynamical simulations.