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.
@article{arxiv.1612.06739,
title = {New Constraints on Spatial Variations of the Fine Structure Constant from Clusters of Galaxies},
author = {I. de Martino and C. J. A. P. Martins and H. Ebeling and D. Kocevski},
journal= {arXiv preprint arXiv:1612.06739},
year = {2016}
}
Comments
10 pages, 1 figures, based on arXiv:1605.03053 and on the oral presentation at VARCOSMOFUN16, accepted for publication in "Universe", Special Issue "Varying Constants and Fundamental Cosmology" for the VARCOSMOFUN16 in Szczecin, Poland, 12-17 September, 2016