Time variability of the gravitational constant and Type Ia supernovae

Abstract

We investigate to which extent a time variation of the gravitational constant or other fundamental constants affects the best fit of the Hubble diagram of type Ia supernovae. In particular, we show that a slow increase of $G$ in the past, below experimental constraints, can reconcile the SNe Ia observations with an open zero-$\Lambda$ universe.

arXiv comment7 pages, including 4 figures, revtex

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