Tachyon cosmology, supernovae data, and the big brake singularity
Abstract
We compare the existing observational data on type Ia supernovae with the evolutions of the Universe predicted by a oneparameter family of tachyon models which we have introduced recently [Phys. Rev. DPRVDAQ05562821 69, 123512 (2004)10.1103/PhysRevD.69.123512]. 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 ΛCDM model.
 Publication:

Physical Review D
 Pub Date:
 April 2009
 DOI:
 10.1103/PhysRevD.79.083504
 arXiv:
 arXiv:0901.2292
 Bibcode:
 2009PhRvD..79h3504K
 Keywords:

 98.80.Cq;
 98.80.Jk;
 98.80.Es;
 95.36.+x;
 Particletheory and fieldtheory models of the early Universe;
 Mathematical and relativistic aspects of cosmology;
 Observational cosmology;
 Dark energy;
 General Relativity and Quantum Cosmology;
 Astrophysics  Cosmology and Extragalactic Astrophysics;
 High Energy Physics  Theory
 EPrint:
 v2: 8 pages, 1 figure + 2 figure panels of 6 figures each