Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-08-01
JCAP 0702:004,2007
Astronomy and Astrophysics
Astrophysics
22 pages, 7 figures; revised version to appear in JCAP; references added
Scientific paper
10.1088/1475-7516/2007/02/004
We consider the hypothesis of a limiting minimal curvature in gravity as a way to construct a class of theories exhibiting late-time cosmic acceleration. Guided by the minimal curvature conjecture (MCC) we are naturally lead to a set of scalar tensor theories in which the scalar is non-minimally coupled both to gravity and to the matter Lagrangian. The model is compared to the Lambda Cold Dark Matter concordance model and to the observational data using the gold SNeIa sample of Riess et. al. (2004). An excellent fit to the data is achieved. We present a toy model designed to demonstrate that such a new, possibly fundamental, principle may be responsible for the recent period of cosmological acceleration. Observational constraints remain to be imposed on these models.
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