Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2012-04-18
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
8 pages. A slightly more concise version was submitted to the Gravity Research Foundation Essay Competition 2012
Scientific paper
We consider a Hubble expansion law modified in the infra-red by distance-dependent terms, and attempt to enforce homogeneity upon it. As a warm-up, we re-derive the basic kinematics of a Friedman Robertson Walker universe without using standard general relativistic tools: we describe the expansion with a `Hubble velocity field' rather than with a four dimensional metric. Then we extend this analysis to the modified Hubble expansion and impose a transformation for velocities that makes it identical for all comoving observers, and therefore homogeneous. We derive the modified equation for light ray trajectories and other geometrical properties that are incompatible with the general relativistic description. We speculate that this extended framework could help addressing cosmological problems which are normally explained with accelerating expansions.
No associations
LandOfFree
Infrared-modified Universe 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 Infrared-modified Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared-modified Universe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-411952