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).
Self-consistent stellar dynamical tori / L. Ciotti, G. Bertin, P. Londrillo (AIP CONFERENCE PROCEEDINGS). - In: Plasmas in the laboratory and in the universe: New insights and new challenges / [a cura di] G. Bertin, D. Farina, R. Pozzoli. - [s.l] : American Institute of Physics, 2004 Apr. - ISBN 0735401764. - pp. 322-325 (( Intervento presentato al 703. convegno Conference on Plasmas in the Laboratory and in the Universe : September, 16th-19th tenutosi a Como nel 2003.
Self-consistent stellar dynamical tori
G. BertinSecondo
;
2004
Abstract
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).Pubblicazioni consigliate
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