Direct evidence of acceleration from distance modulus redshift graph
Astrophysics
2008-11-26 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
The energy conditions give upper bounds on the luminosity distance. We apply these upper bounds to the 192 essence supernova Ia data to show that the Universe had experienced accelerated expansion. This conclusion is drawn directly from the distance modulus-reshift graph. In addition to be a very simple method, this method is also totally independent of any cosmological model. From the degeneracy of the distance modulus at low redshift, we argue that the choice of for probing the property of dark energy is misleading. One explicit example is used to support this argument.
Keywords
Cite
@article{arxiv.astro-ph/0703583,
title = {Direct evidence of acceleration from distance modulus redshift graph},
author = {Yungui Gong and Anzhong Wang and Qiang Wu and Yuan-Zhong Zhang},
journal= {arXiv preprint arXiv:astro-ph/0703583},
year = {2008}
}
Comments
use revtex,8 figures, JCAP in press, section 2 is re-organized. add more discussions on the dark energy parametrization