Universe 2016, 2(4), 34; https://doi.org/10.3390/universe2040034
New Constraints on Spatial Variations of the Fine Structure Constant from Clusters of Galaxies
1
Faculty of Science and Technology, Department of Theoretical Physics and History of Science, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain
2
Centro de Astrofisica da Universidade do Porto, Rua das Estrelas s/n, 4150-762 Porto, Portugal
3
Instituto de Astrofísica e Ciências do Espaço, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal
4
Institute for Astronomy, University of Hawaii, Honolulu, HI 96822, USA
5
Department of Physics and Astronomy, Colby College, Waterville, ME 04901, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Mariusz P. Dąbrowski, Manuel Krämer and Vincenzo Salzano
Received: 30 October 2016 / Revised: 6 December 2016 / Accepted: 12 December 2016 / Published: 21 December 2016
(This article belongs to the Special Issue Varying Constants and Fundamental Cosmology)
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 ∼2.5 previous results from Cosmic Microwave Background power spectrum and from galaxy clusters, respectively. View Full-TextKeywords:
cluster of galaxies; Cosmic Microwave Background; varying fine structure constant; Sunyaev-Zeldovich effect
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De Martino, I.; Martins, C.J.A.P.; Ebeling, H.; Kocevski, D. New Constraints on Spatial Variations of the Fine Structure Constant from Clusters of Galaxies. Universe 2016, 2, 34.
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