Cosmological perturbations in the models of dark energy and modified gravity

Abstract

The quasi-static solutions of the matter density perturbation in various dark energy models and modified gravity models have been investigated in numerous papers. However, the oscillating solutions in those models have not been investigated enough so far. In this paper, the oscillating solutions, which have a possibility to unveil the difference between the models of the late-time accelerated expansion of the Universe, are also mentioned by using appropriate approximations.

7 pages, to appear in the proceedings of The 10th International Symposium on Cosmology and Particle Astrophysics (CosPA2013)

References in corpus (5)

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• On the evolution of density perturbations in f(R) theories of gravity
• Cosmological perturbations in $F(R)$ gravity
• Cosmological perturbations in $k$-essence model
• On the necessity of the revisions for the cosmological matter perturbations from the general relativity

Cited by in corpus (1)

• Constraints on the speed of sound in the k-essence model of dark energy