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|Type:||Artigo de periódico|
|Title:||Analytical potential-density pairs for flat rings and toroidal structures|
|Abstract:||The Kuzmin-Toomre family of discs is used to construct potential-density pairs that represent flat ring structures in terms of elementary functions. Systems composed of two concentric flat rings, a central disc surrounded by one ring and a ring with a centre of attraction are also presented. The circular velocity of test particles and the epicyclic frequency of small oscillations about circular orbits are calculated for these structures. A few examples of three-dimensional potential-density pairs of 'inflated' flat rings (toroidal mass distributions) are presented.|
galaxies: kinematics and dynamics
|Editor:||Wiley-blackwell Publishing, Inc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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