Constraining f(R) theories with cosmography
A method to set constraints on the parameters of extended theories of gravitation is presented. It is based on the comparison of two series expansions of any observable that depends on H(z). The first expansion is of the cosmographical type, while the second uses the dependence of H with z furnished...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/23061 |
| Acceso en línea: | http://hdl.handle.net/11336/23061 |
| Access Level: | acceso abierto |
| Palabra clave: | Modified Gravity Gravity Cosmology Of Theories Beyond the Sm https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | A method to set constraints on the parameters of extended theories of gravitation is presented. It is based on the comparison of two series expansions of any observable that depends on H(z). The first expansion is of the cosmographical type, while the second uses the dependence of H with z furnished by a given type of extended theory. When applied to f(R) theories together with the redshift drift, the method yields limits on the parameters of two examples (the theory of Hu and Sawicki, and the exponential gravity introduced by Linder) that are compatible with or more stringent than the existing ones, as well as a limit for a previously unconstrained parameter. |
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