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New Constraints on Spatial Variations of the Fine Structure Constant from Clusters of Galaxies

I. de Martino, C. J. A. P. Martins, H. Ebeling, D. Kocevski

We have constrained the spatial variation of the fine structure constant using multi-frequency measurements of the thermal Sunyaev-Zeldovich effect of 618 X-ray selected clusters. Although our results are not competitive with the ones from quasar absorption lines, we improved by a factor 10 and similar to 2.5 previous results from Cosmic Microwave Background power spectrum and from galaxy clusters, respectively.

Astrophysics - Cosmology and Nongalactic Astrophysics

Volume 2, Number 4-34
2016 December

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia