The pendulum dilemma of fish orbits

Details The pendulum dilemma of fish orbits The pendulum dilemma of fish orbits

1999-06-15

arxiv.org/abs/astro-ph/9906244v1

Astronomy and Astrophysics

Astrophysics

13 pages, 2 PS Figs, MNRAS accepted

Scientific paper

10.1046/j.1365-8711.1999.02871.x

The shape of a galaxy is constrained both by mechanisms of formation (dissipational vs. dissipationless) and by the available orbit families (the shape and amount of regular and stochastic orbits). It is shown that, despite the often very flattened shapes of banana and fish orbits, these boxlet orbits generally do not fit a triaxial galaxy in detail because, similar to loop orbits, they spend too little time at the major axis of the model density distribution. This constraint from the shape of fish orbits is relaxed at (large) radii where the density profile of a galaxy is steep.

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