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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

Abstract
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.

Keywords
Astrophysics - Cosmology and Nongalactic Astrophysics

Universe
Volume 2, Number 4-34
2016 December

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Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa Fundação para a Ciência e a Tecnologia