| Texto completo | |
| Autor(es): |
Alves, M. E. S.
;
Carvalho, F. C.
;
de Araujo, J. C. N.
;
Miranda, O. D.
;
Wuensche, C. A.
;
Santos, E. M.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 82, n. 2, p. 6-pg., 2010-07-13. |
| Resumo | |
Theories of gravity for which gravitons can be treated as massive particles have presently been studied as realistic modifications of general relativity, and can be tested with cosmological observations. In this work, we study the ability of a recently proposed theory with massive gravitons, the so-called Visser theory, to explain the measurements of luminosity distance from the Union2 compilation, the most recent Type-Ia Supernovae (SNe Ia) data set, adopting the current ratio of the total density of nonrelativistic matter to the critical density (Omega(m)) as a free parameter. We also combine the SNe Ia data with constraints from baryon acoustic oscillations (BAO) and cosmic microwave background (CMB) measurements. We find that, for the allowed interval of values for Omega(m), a model based on Visser's theory can produce an accelerated expansion period without any dark energy component, but the combined analysis (SNe Ia + BAO + CMB) shows that the model is disfavored when compared with the Lambda CDM model. (AU) | |
| Processo FAPESP: | 06/03158-0 - Fundos estocásticos primordiais de ondas gravitacionais |
| Beneficiário: | Márcio Eduardo da Silva Alves |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 07/08560-4 - Teorias f(R) de gravidade e a radiação cósmica de fundo em micro-ondas |
| Beneficiário: | Fabio Cabral Carvalho |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |