Variação da constante de estrutura fina devido a um escalar cosmológico
In this work, we present the evolution and the consequent variation of the fine structure constant a due to a cosmological scalar, which in our case is coupled to the electromagnetic field. To do so, we use a quintessence cosmological model to demonstrate the cosmic evolution of a through a dynamica...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | Brasil |
| Institución: | Universidade Federal do Espírito Santo (UFES) |
| Repositorio: | Repositório Institucional da Universidade Federal do Espírito Santo (riUfes) |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.ufes.br:10/10795 |
| Acceso en línea: | http://repositorio.ufes.br/handle/10/10795 |
| Access Level: | acceso abierto |
| Palabra clave: | Cosmology Quintessence Fine Structure Constant Variation of constants Cosmologia Quintessência Constante de estrutura fina Variação de constantes Física 53 |
| Sumario: | In this work, we present the evolution and the consequent variation of the fine structure constant a due to a cosmological scalar, which in our case is coupled to the electromagnetic field. To do so, we use a quintessence cosmological model to demonstrate the cosmic evolution of a through a dynamical system. Then we compare its evolution with the observational limits on the variation of a. We conclude that it is useful to consider interactions between dark energy and other fields because we can use more observational data (limits on the variation of a) in order to constrain the nature of dark energy. |
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