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Cosmology with Coupled Gravity and Dark Energy | Ti-Pei Li
; | Date: |
6 Oct 2014 | Abstract: | Dark energy is a fundamental constituent of our universe, its status in the
cosmological field equation should be equivalent to that of gravity. Here we
construct a dark energy-gravity coupling (DEMC) model of cosmology in a way
that dark energy and gravity are introduced into the cosmological field
equation in parallel with each other from the beginning. The DEMC universe
possesses a composite symmetry from global Galileo invariance and local Lorentz
invariance. The observed evolution of the universe expansion rate at redshift
z>1 is in tension with the standard LCDM model, but can be well predicted by
the DEMC model from measurements of only nearby epochs. The so far most precise
measured expansion rate at high z is quite a bit slower than the expectations
from LCDM, but remarkably consistent with that from DEMC. It is hoped that the
DEMC scenario can also help to solve other existing challenges to cosmology:
large scale anomalies in CMB maps and large structures up to about 10^3 Mpc of
a quasar group. The DEMC universe is a well defined mechanical system. From
measurements we can quantitatively evaluate its total rest energy, present
absolute radius and expanding speed. | Source: | arXiv, 1409.0782 | Services: | Forum | Review | PDF | Favorites |
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