Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10725659 | Physics Letters B | 2005 | 8 Pages |
Abstract
We apply the thermodynamical model of the cosmological event horizon of the spatially flat FLRW metrics to the study of the recent accelerated expansion phase and to the coincidence problem. This model, called “ehT model” hereafter, led to a dark energy (DE) density Î varying as râ2, where r is the proper radius of the event horizon. Recently, another model motivated by the holographic principle gave an independent justification of the same relation between Î and r. We probe the theoretical results of the ehT model with respect to the SnIa observations and we compare it to the model deduced from the holographic principle, which we call “LHG model” in the following. Our results are in excellent agreement with the observations for H0=64kmsâ1Mpcâ1, and ΩÎ0=0.63â0.01+0.1, which leads to q0=â0.445 and zTâ0.965.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
J. Gariel, G. Le Denmat, C. Barbachoux,