Newtonian limit of nonlocal cosmology
arXiv:0807.3778 · doi:10.1103/PhysRevD.78.123505
Abstract
We study the consequences of the gravity models for the Solar system and the large scale structure of the universe. The spherically symmetric solutions can be used to obtain bounds on the constant and the linear parts of the correction terms. The evolution of cosmological matter structures is shown to be governed by an effective time dependent Newton's constant. We also analyze the propagation of the perturbation modes. Tensor and vector modes are only slightly modified, but two new scalar degrees of freedom are present. Their causality and stability is demonstrated, and their formal ghost conditions are related to a singularity of the cosmological background. In general, the Newtonian limit of these models has no apparent conflicts with observations but can provide useful constraints.
12 pages, refs added
References in corpus (19)
- Extended Theories of Gravity and their Cosmological and Astrophysical Applications
- Future of the universe in modified gravitational theories: Approaching to the finite-time future singularity
- Distinguishing Modified Gravity from Dark Energy
- Modified non-local-F(R) gravity as the key for the inflation and dark energy
- Degravitation of the Cosmological Constant and Graviton Width
- A Singularity Problem with f(R) Dark Energy
- Perturbations in generalized multi-field inflation
- Effective Action of Vacuum: Semiclassical Approach
- Relativistic stars in f(R) gravity, and absence thereof
- Weak Lensing Probes of Modified Gravity
- Phantom and non-phantom dark energy: The cosmological relevance of non-locally corrected gravity
- Localization of nonlocal theories
- Route to nonlocal cosmology
- Bouncing and Accelerating Solutions in Nonlocal Stringy Models
- Delicate f(R) gravity models with disappearing cosmological constant and observational constraints on the model parameters
- Viable Palatini-f(R) cosmologies with generalized dark matter
- Diffusing non-local inflation: Solving the field equations as an initial value problem
- Predictions for Nongaussianity from Nonlocal Inflation
- Secular effects on inflation from one-loop quantum gravity