From Hubble diagrams to scale factors

Details From Hubble diagrams to scale factors From Hubble diagrams to scale factors

2005-06-20

arxiv.org/abs/astro-ph/0506457v1

Astronomy and Astrophysics

Astrophysics

13 pages, 6 figures

Scientific paper

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.

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