2024
DOI: 10.1093/mnras/stae2070
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A stochastic approach to reconstructing the speed of light in cosmology

Cheng-Yu Zhang,
Wei Hong,
Yu-Chen Wang
et al.

Abstract: The varying speed of light (VSL) model describes how the speed of light in a vacuum changes with cosmological redshift. Despite numerous models, there is little observational evidence for this variation. While the speed of light can be accurately measured by physical means, cosmological methods are rarely used. Previous studies quantified the speed of light at specific redshifts using Gaussian processes and reconstructed the redshift-dependent function $c(z)$. It is crucial to quantify the speed of light acros… Show more

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