Dark Energy and Dark Matter in $f(R)$ Gravity and an Alternative Chameleon Mechanism

Abstract

Metric $f(R)$ gravity theories behave like GR with cosmological constant when $f"(R)$ = 0, and like scalar-tensor theories elsewhere. I investigate the transition from $f"(R)\ne 0$ to $f"(R)=0$, and show that this theory may offer a way to explain Dark Energy and/or Dark Matter without having to make use of the chameleon mechanism to agree with solar system tests.

References in corpus (6)

• Solar system and equivalence principle constraints on f(R) gravity by chameleon approach
• Dark matter as a geometric effect in f(R) gravity
• Equivalence Principle Implications of Modified Gravity Models
• Constraints on scalar-tensor models of dark energy from observational and local gravity tests
• Modeling halo mass functions in chameleon f(R) gravity
• Gravitational waves and lensing of the metric theory proposed by Sobouti

Cited by in corpus (3)

• The Influence of Modification of Gravity on the Dynamics of Radiating Spherical Fluids
• Instability of Meridional Axial System in f(R) Gravity
• Energy Conditions in Higher Derivative $f(R,\square R,T)$ Gravity