| Full text | |
| Author(s): |
Holanda, R. F. L.
;
Landau, S. J.
;
Alcaniz, J. S.
;
Sanchez G., I. E.
;
Busti, V. C.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Journal of Cosmology and Astroparticle Physics; v. N/A, n. 5, p. 13-pg., 2016-05-01. |
| Abstract | |
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) | |
| FAPESP's process: | 14/21098-1 - Precision cosmology with the Dark Energy Survey |
| Grantee: | Vinicius Consolini Busti |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |