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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Constraints on a possible variation of the fine structure constant from galaxy cluster data

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Autor(es):
Holanda, R. F. L. [1, 2] ; Landau, S. J. [3, 4] ; Alcaniz, J. S. [5] ; Sanchez G., I. E. [3, 4] ; Busti, V. C. [6]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Estadual Paraiba, Dept Fis, BR-58429500 Campina Grande, PB - Brazil
[2] Univ Fed Campina Grande, Dept Fis, BR-58429900 Campina Grande, PB - Brazil
[3] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Ciudad Univ PabI, RA-1428 Buenos Aires, DF - Argentina
[4] Consejo Nacl Invest Cient & Tecn, IFIBA, Ciudad Univ PabI, RA-1428 Buenos Aires, DF - Argentina
[5] Observ Nacl, Dept Astron, BR-20921400 Rio De Janeiro, RJ - Brazil
[6] Univ Sao Paulo, Inst Fis, Dept Fis Matemat, CP 66318, BR-05508090 Sao Paulo, SP - Brazil
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Journal of Cosmology and Astroparticle Physics; n. 5 MAY 2016.
Citações Web of Science: 0
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
Linha de fomento: Bolsas no Brasil - Pós-Doutorado