Uniqueness results for co-circular central configurations for power-law potentials
For a class of potential functions including those used for the planar n-body and n-vortex problems, we investigate co-circular central configurations whose center of mass coincides with the center of the circle containing the bodies. Useful equations are derived that completely describe the problem...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:150681 |
| Acceso en línea: | https://ddd.uab.cat/record/150681 https://dx.doi.org/urn:doi:10.1016/j.physd.2014.05.003 |
| Access Level: | acceso abierto |
| Palabra clave: | Central configuration N-body problem N-vortex problem Co-circular central configuration |
| Sumario: | For a class of potential functions including those used for the planar n-body and n-vortex problems, we investigate co-circular central configurations whose center of mass coincides with the center of the circle containing the bodies. Useful equations are derived that completely describe the problem. Using a topological approach, it is shown that for any choice of positive masses (or circulations), if such a central configuration exists, then it is unique. It quickly follows that if the masses are all equal, then the only solution is the regular n-gon. For the planar n-vortex problem and any choice of the vorticities, we show that the only possible cocircular central configuration with center of vorticity at the center of the circle is the regular n-gon with equal vorticities. |
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