Galaxy clusters, cosmic chronometers and the Einstein equivalence principle

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...

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Bibliographic Details
Published in:arXiv.org 2021-10
Main Authors: I E C R Mendonça, Bora, Kamal, Holanda, R F L, Desai, Shantanu
Format: Article
Language:English
Subjects:
Chronometers
Depletion
Equivalence principle
Fine structure
Galactic clusters
Measuring instruments
Relativity
Scalars
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2107.14169