Can a changing $α$ explain the Supernovae results?

Details Can a changing $α$ explain the Supernovae results? Can a changing $α$ explain the Supernovae results?

1999-07-26

arxiv.org/abs/astro-ph/9907354v2

Astronomy and Astrophysics

Astrophysics

Latex file, uses aasms4 style file, 1 ps figure. Replaced with revised version, to be published in Ap.J.Lett

Scientific paper

10.1086/312572

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 $\alpha$. 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 $\Lambda$ is prevented from dominating the Universe by the usual VSL mechanism. In the matter epoch the varying c effects switch off, allowing $\Lambda$ to eventually surface and lead to an accelerating Universe. By the time this happens the residual variations in c imply a changing $\alpha$ at a rate that is in agreement with observations.

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