| Issue |
A&A
Volume 447, Number 2, February IV 2006
|
|
|---|---|---|
| Page(s) | 413 - 418 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361:20053668 | |
| Published online | 07 February 2006 | |
From Hubble diagrams to scale factors
1
Centre de Physique Théorique, CNRS – Luminy, Case 907, 13288 Marseille Cedex 9, France e-mail: schucker@cpt.univ-mrs.fr
2
Centre de Physique des Particules de Marseille, CNRS – Luminy, Case 907, 13288 Marseille Cedex 9, France e-mail: tilquin@cppm.in2p3.fr
Received:
21
June
2005
Accepted:
23
September
2005
Context.
Aims.We study the image of the transform from scale parameters to Hubble
diagrams and present a lower bound on the radius of the universe
today a0 and a monotonicity constraint on the Hubble diagram.
Methods.Our theoretical input is minimal:
Einstein's kinematics and maximally symmetric universes.
Results.Present supernova data yield 
, i.e. 
. We attempt to quantify the monotonicity constraint and
do not see any indication of non-monotonicity.
Conclusions.
© ESO, 2006
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