Time variability of the gravitational constant and Type Ia supernovae

Details Time variability of the gravitational constant and Type Ia supernovae Time variability of the gravitational constant and Type Ia supernovae

1999-07-16

arxiv.org/abs/astro-ph/9907222v1

Astronomy and Astrophysics

Astrophysics

7 pages, including 4 figures, revtex

Scientific paper

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.

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