Measuring the expansion of the universe
Cosmology and Nongalactic Astrophysics
2020-05-26 v4
Abstract
We draw a figure from where it is possible to measure the number of e-folds of expansion of the universe with a ruler. We find model independent bounds for the number of e-folds during inflation, reheating and radiation. We also give a lower bound to the size of the universe at the beginning of observable inflation. Finally, we show that consistency with a relevant diagram requires the existence of a new form of energy to drive the present expansion of the universe.
Keywords
Cite
@article{arxiv.2005.02278,
title = {Measuring the expansion of the universe},
author = {Gabriel German},
journal= {arXiv preprint arXiv:2005.02278},
year = {2020}
}
Comments
13 pages, 4 figures, 1 table. A new section has been added. Improved presentation. Misprints in Table I have been corrected. Version sent for publication