Geometry of Dark Energy

M. D. Maia, A. J. S. Capistrano, J. S. Alcaniz, E. M. Monte

Published 2009-05-26Version 1

The acceleration of the universe is described as a dynamical effect of the extrinsic curvature of space-time. By extending previous results, the extrinsic curvature is regarded as an independent spin-2 field, determined by a set of non-linear equations similar to Einstein's equations. In this framework, we investigate some cosmological consequences of this class of scenarios and test its observational viability by performing a statistical analysis with current type Ia Supernova data.