It is often assumed that a warped
galaxy can be modeled by a set of rings.
This paper verifies numerically
the validity of this assumption by the study of periodic orbits populating a
heavy self-gravitating warped disk.
The phase space structure of a warped model reveals that the circular periodic
orbits of a flat disk are transformed in quasi annular periodic orbits which conserve their stability.
This lets us also explore the problem
of the persistence of a large outer warp. In particular,
the consistency of its orbits with the density distribution is checked as a
function of the pattern speed.
kinematics and dynamics of galaxies -
warped galaxies -
Periodic orbits in warped disks
Y. Revaz - D. Pfenniger
Geneva Observatory, University of Geneva, CH-1290 Sauverny, Switzerland
Received 22 November 2000/ Accepted 9 April 2001