Palatini f(R) Cosmology

Abstract

We investigate the modified gravity theories in terms of the effective dark energy models. We compare the cosmic expansion history and the linear growth in different models. We also study the evolution of linear cosmological perturbations in modified theories of gravity assuming the Palatini formalism. We find the stability of the superhorizon metric evolution depends on models. We also study the matter density fluctuation in the general gauge and show the differential equations in super and sub-horizon scales.

10 pages, CosPA 2007 Proceeding will be published in the Mod. Phys. Lett. A

References in corpus (5)

• 4D Gravity on a Brane in 5D Minkowski Space
• Prospects for probing the dark energy via supernova distance measurements
• Cosmic Structure Growth and Dark Energy
• Testing Gravity Against Early Time Integrated Sachs-Wolfe Effect
• Stability of Palatini-f(R) cosmology

Cited by in corpus (8)

• f(R) Theories Of Gravity
• Modified Gravity and Cosmology
• f(R) theories
• Constraints on dissipative unified dark matter
• Viability of Noether symmetry of F(R) theory of gravity
• Exact Cosmological Solutions of $f(R)$ Theories via Hojman Symmetry
• Fermionic Tachyons as a Source of Dark Energy
• Conformal Frame dependence on Cosmological Observations in Scalar-Tensor Theories of Gravity