Tachyon cosmology, supernovae data and the Big Brake singularity
General Relativity and Quantum Cosmology
2009-04-22 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We compare the existing observational data on type Ia Supernovae with the evolutions of the universe predicted by a one-parameter family of tachyon models which we have introduced recently in paper \cite{we-tach}. Among the set of the trajectories of the model which are compatible with the data there is a consistent subset for which the universe ends up in a new type of soft cosmological singularity dubbed Big Brake. This opens up yet another scenario for the future history of the universe besides the one predicted by the standard CDM model.
Keywords
Cite
@article{arxiv.0901.2292,
title = {Tachyon cosmology, supernovae data and the Big Brake singularity},
author = {Z. Keresztes and L. Á. Gergely and V. Gorini and U. Moschella and A. Yu. Kamenshchik},
journal= {arXiv preprint arXiv:0901.2292},
year = {2009}
}
Comments
v2: 8 pages, 1 figure + 2 figure panels of 6 figures each; slightly shortened for improved presentation; new references; published version