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arXiv · astro-ph/9907354

Can a changing $α$ explain the Supernovae results?

John D. Barrow·Joao Magueijo
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Abstract

We show that the Supernovae results, implying evidence for an accelerating Universe, may be closely related to the recent discovery of redshift dependence in the fine structure constant $α$. The link is a class of varying speed of light (VSL) theories which contain cosmological solutions similar to quintessence. During the radiation dominated epoch the cosmological constant $Λ$ is prevented from dominating the Universe by the usual VSL mechanism. In the matter epoch the varying c effects switch off, allowing $Λ$ to eventually surface and lead to an accelerating Universe. By the time this happens the residual variations in c imply a changing $α$ at a rate that is in agreement with observations.

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John D. Barrow, Joao Magueijo. 2000-02-22. Can a changing $α$ explain the Supernovae results?. https://doi.org/10.1086/312572

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