| Texto completo | |
| Autor(es): |
Lima, J. A. S.
;
Holanda, R. F. L.
;
Cunha, J. V.
;
Alimi, JM
;
Fuzfa, A
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | INVISIBLE UNIVERSE INTERNATIONAL CONFERENCE; v. 1241, p. 6-pg., 2010-01-01. |
| Resumo | |
The present cosmic accelerating stage is discussed through a new kinematic method based on the Sunyaev-Zel'dovich effect (SZE) and X-ray surface brightness data from galaxy clusters. By using the SZE/X-ray data from 38 galaxy clusters in the redshift range 0.14 <= z <= 0.89 [Bonament et al., Astrop. J. 647, 25 (2006)] it is found that the present Universe is accelerating and that the transition from an earlier decelerating to a late time accelerating regime is relatively recent. The ability of the ongoing Planck satellite mission to obtain tighter constraints on the expansion history through SZE/X-ray angular diameters is also discussed. Our results are fully independent on the validity of any metric gravity theory, the possible matter-energy contents filling the Universe, as well as on the SNe Ia Hubble diagram from which the presenting accelerating stage was inferred. (AU) | |
| Processo FAPESP: | 05/02809-5 - Investigando as componentes escuras do universo com raios-X, SNE IA, RCF, efeito Sunyaev-Zel'dovich e idades de objetos velhos |
| Beneficiário: | João Vital da Cunha Júnior |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 04/13668-0 - Cosmologia na era da precisão: energia escura, matéria escura e radiação cósmica de fundo |
| Beneficiário: | Jose Ademir Sales de Lima |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |