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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2006

From Hubble diagrams to scale factors

Résumé

We present a lower bound on the radius of the universe today $a_0$ and a monotonicity constraint on the Hubble diagram. Our theoretical input is Einstein's kinematics and maximally symmetric universes. Present supernova data yield $a_0 > 1.2\cdot 10^{26}$ m. A first attempt to quantify the monotonicity constraint is described. We do not see any indication of non-monotonicity.

Dates et versions

hal-00018624 , version 1 (06-02-2006)

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Thomas Schucker, Andre Tilquin. From Hubble diagrams to scale factors. Astronomy and Astrophysics - A&A, 2006, 447, pp.413-418. ⟨10.1051/0004-6361:20053668⟩. ⟨hal-00018624⟩
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