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arXiv · 2302.00867

Examining the validity of the minimal varying speed of light model through cosmological observations: relaxing the null curvature constraint

Purba Mukherjee·Gabriel Rodrigues·Carlos Bengaly
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Abstract

We revisit a consistency test for the speed of light variability, using the latest cosmological observations. This exercise can serve as a new diagnostics for the standard cosmological model and distinguish between the minimal varying speed of light in the Friedmann-Lema\^{i}tre-Robertson-Walker universe. We deploy Gaussian processes to reconstruct cosmic distances and ages in the redshift range $0 1$ with a particular reconstruction kernel when $a$-BAO data are included. Still, we ascribe no statistical significance to this result bearing in mind the degeneracy between the associated priors for combined analysis, and incompleteness of the $a$-BAO data set at higher $z$.

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Purba Mukherjee, Gabriel Rodrigues, Carlos Bengaly. 2023-02-02. Examining the validity of the minimal varying speed of light model through cosmological observations: relaxing the null curvature constraint. https://doi.org/10.1016/j.dark.2023.101380

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