| Texto completo | |
| Autor(es): |
Holanda, R. F. L.
;
Landau, S. J.
;
Alcaniz, J. S.
;
Sanchez G., I. E.
;
Busti, V. C.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Cosmology and Astroparticle Physics; v. N/A, n. 5, p. 13-pg., 2016-05-01. |
| Resumo | |
We propose a new method to probe a possible time evolution of the fine structure constant a from X-ray and Sunyaev-Zel'dovich measurements of the gas mass fraction (f(gas)) in galaxy clusters. Taking into account a direct relation between variations of a and violations of the distance-duality relation, we discuss constraints on a for a class of dilator' runaway models. Although riot vet competitive with bounds from high-z quasar absorption systems, our constraints, considering a sample of 29 measurements of f(gas), in the redshift interval 0.14 < z < 0.89, provide an independent estimate of a variation at low and intermediate redshifts. Furthermore, current and planned surveys will provide a larger amount of data and thus allow to improve the limits on alpha variation obtained in the present analysis. (AU) | |
| Processo FAPESP: | 14/21098-1 - Cosmologia de precisão com o Dark Energy Survey |
| Beneficiário: | Vinicius Consolini Busti |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |