A search for the variation of speed of light using galaxy cluster gas mass fraction measurements

Mendonça, I.E.C.R. and Bora, Kamal and Holanda, R.F.L. and Desai, Shantanu and Pereira, S.H. (2021) A search for the variation of speed of light using galaxy cluster gas mass fraction measurements. Journal of Cosmology and Astroparticle Physics, 2021 (11). ISSN 1475-7516

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In this paper, we implement a new method to test the invariance of the speed of light (c) as a function of redshift, by combining the measurements of galaxy cluster gas mass fraction, H(z) from cosmic chronometers, and Type-Ia supernovae (SNe Ia). In our analyses, we consider both a constant depletion factor (which corresponds to the ratio by which the cluster gas mass fraction is depleted with respect to the universal baryonic mean) and one varying with redshift. We also consider the influence of different H 0 estimates on our results. We look for a variation of c, given by c(z) = c 0(1+c 1 z). We find a degeneracy between our final results on c variation and the assumptions on the gas mass fraction depletion factor. Most of our analyses indicate negligible variation of the speed of light. © 2021 IOP Publishing Ltd and Sissa Medialab.

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IITH Creators:
IITH CreatorsORCiD
Desai, Shantanuhttp://orcid.org/0000-0002-0466-3288
Item Type: Article
Uncontrolled Keywords: cosmology of theories beyond the SM; galaxy clusters; supernova type Ia-standard candles
Subjects: Physics
Divisions: Department of Physics
Depositing User: . LibTrainee 2021
Date Deposited: 04 Aug 2022 07:25
Last Modified: 04 Aug 2022 07:25
URI: http://raiith.iith.ac.in/id/eprint/10083
Publisher URL: http://doi.org/10.1088/1475-7516/2021/11/034
OA policy: https://v2.sherpa.ac.uk/id/publication/11312
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