Self-consistent stellar dynamical tori

Details Self-consistent stellar dynamical tori Self-consistent stellar dynamical tori

2003-12-18

arxiv.org/abs/astro-ph/0312489v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, to appear in "Plasmas in the Laboratory and in the Universe: new insights and new challenges", G. Bertin,

Scientific paper

10.1063/1.1718475

We present preliminary results on a new family of distribution functions that are able to generate axisymmetric, truncated (i.e., finite size) stellar dynamical models characterized by toroidal shapes. The relevant distribution functions generalize those that are known to describe polytropic spheres, for which all the dynamical and structural properties of the system can be expressed in explicit form as elementary functions of the system gravitational potential. The model construction is then completed by a numerical study of the associated Poisson equation. We note that our axisymmetric models can also include the presence of an external gravitational field, such as that produced by a massive disk or by a central mass concentration (e.g., a supermassive black hole).

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