Galaxy clusters, cosmic chronometers and the Einstein equivalence principle
| Autor: | Shantanu Desai, Kamal Bora, I. E. C. R. Mendonça, R. F. L. Holanda |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO) COSMIC cancer database General relativity FOS: Physical sciences Astronomy and Astrophysics Fine-structure constant General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics Curvature General Relativity and Quantum Cosmology symbols.namesake Theoretical physics symbols Einstein Equivalence principle Scalar field Galaxy cluster Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Journal of Cosmology and Astroparticle Physics. 2021:084 |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2021/10/084 |
| Popis: | 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. 11 pages, 4 figures, I table, Accepted Version for Publication in JCAP |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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