Smooth deformations and cosmic statefinders
arXiv:1408.2415 · doi:10.1093/mnras/stv052
Abstract
We study the possibility that the universe is subjected to a deformation, besides its expansion described by Friedmann's equations. The concept of smooth deformation of a riemannian manifolds associated with the extrinsic curvature is applied the standard FLRW cosmology. Starting from the resulting modified Friedman's equation we study two possible solutions with six models for each one in low redshift. In other to constrain the models, we calculate deceleration, jerk and Hubble parameters and compare with different data as the latest BAO/CMB + SNIa constraints, SNLS SNIa, x-ray galaxy clusters and the gold sample (SNIa). As a result, we obtain a set of proper models compatible with the current observational data.
12 pages, 6 figures
References in corpus (11)
- Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
- A kinematical approach to dark energy studies
- Structure formation in the presence of dark energy perturbations
- Toward a solution of the coincidence problem
- The cosmic jerk parameter in f(R) gravity
- Anisotropic brane gravity with a confining potential
- Accelerating universe in brane gravity with a confining potential
- Classical tests in brane gravity
- BAO cosmography
- Probing Cosmic Acceleration by Using the SNLS3 SNIa Dataset
- Geometrical aspects on the dark matter problem