Almost-homogeneity of the universe in higher-order gravity

Details Almost-homogeneity of the universe in higher-order gravity Almost-homogeneity of the universe in higher-order gravity

1995-11-15

arxiv.org/abs/gr-qc/9511043v1

Gen.Rel.Grav. 27 (1995) 1309

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages LaTeX, no figures; to appear in General Relativity and Gravitation

Scientific paper

10.1007/BF02153319

In the $R+\alpha R^2$ gravity theory, we show that if freely propagating massless particles have an almost isotropic distribution, then the spacetime is almost Friedmann-Robertson-Walker (FRW). This extends the result proved recently in general relativity ($\alpha=0$), which is applicable to the microwave background after photon decoupling. The higher-order result is in principle applicable to a massless species that decouples in the early universe, such as a relic graviton background. Any future observations that show small anisotropies in such a background would imply that the geometry of the early universe were almost FRW.

Affiliated with

Also associated with

No associations

Rating

Almost-homogeneity of the universe in higher-order gravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Almost-homogeneity of the universe in higher-order gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Almost-homogeneity of the universe in higher-order gravity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-113011