Galaxy clusters, cosmic chronometers and the Einstein equivalence principle

Mendonça, I.E.C.R. and Bora, Kamal and Holanda, R.F.L. and Desai, Shantanu (2021) Galaxy clusters, cosmic chronometers and the Einstein equivalence principle. Journal of Cosmology and Astroparticle Physics, 2021 (10). 084. ISSN 1475-7516

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The Einstein equivalence principle in the electromagnetic sector can be violated in modifications of gravity theory generated by a multiplicative coupling of a scalar field to the electromagnetic Lagrangian. In such theories, deviations of the standard result for the cosmic distance duality relation, and a variation of the fine structure constant are expected and are unequivocally intertwined. In this paper, we search for these possible cosmological signatures by using galaxy cluster gas mass fraction measurements and cosmic chronometers. No significant departure from general relativity is found regardless of our assumptions about cosmic curvature or a possible depletion factor evolution in cluster measurements. © 2021 IOP Publishing Ltd and Sissa Medialab.

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IITH Creators:
IITH CreatorsORCiD
Desai, Shantanu
Item Type: Article
Uncontrolled Keywords: cosmology of theories beyond the SM; galaxy clusters; modified gravity
Subjects: Physics
Divisions: Department of Physics
Depositing User: . LibTrainee 2021
Date Deposited: 24 Aug 2022 10:55
Last Modified: 24 Aug 2022 10:55
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