EAS Publications Series
Volume 10, 2003JENAM 2002, Galactic & Stellar Dynamics
|Page(s)||111 - 111|
|Published online||22 December 2003|
C. Boily, P. Patsis, S. Portegies Zwart, R. Spurzem and C. Theis (eds)
EAS Publications Series, 10 (2003) 111
Orbits in Adiabatically Contracting Spherical Potentials
Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, 69117 Heidelberg, Germany
It was recently shown in N-body simulations that the simple adiabatic invariant r M(r) describes the evolution of a contracting spherical density distribution very well. This is surprising as this adiabatic invariant is only valid for circular orbits. Orbits in spherically symmetric potentials resemble rather precessing ellipses. We want to highlight some problems involved in proving the validity of the adiabatic approximation on a orbit to orbit basis. Statistical methods are more promising.
© EAS, EDP Sciences, 2003
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