Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2005-11-14
Class.Quant.Grav. 23 (2006) 4819-4828
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
11 pages; published version
Scientific paper
10.1088/0264-9381/23/15/003
We study the present, flat isotropic universe in 1/R-modified gravity. We use the Palatini (metric-affine) variational principle and the Einstein (metric-compatible connected) conformal frame. We show that the energy density scaling deviates from the usual scaling for nonrelativistic matter, and the largest deviation occurs in the present epoch. We find that the current deceleration parameter derived from the apparent matter density parameter is consistent with observations. There is also a small overlap between the predicted and observed values for the redshift derivative of the deceleration parameter. The predicted redshift of the deceleration-to-acceleration transition agrees with that in the \Lambda-CDM model but it is larger than the value estimated from SNIa observations.
No associations
LandOfFree
The present universe in the Einstein frame, metric-affine R+1/R 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 The present universe in the Einstein frame, metric-affine R+1/R gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The present universe in the Einstein frame, metric-affine R+1/R gravity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-218471