Phys. Rev. D 79, 083504 (2009) [8 pages]Tachyon cosmology, supernovae data, and the big brake singularityReceived 15 January 2009; published 6 April 2009 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 [ Phys. Rev. D 69 123512 (2004)]. 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.79.083504
DOI:
10.1103/PhysRevD.79.083504
PACS:
98.80.Cq, 98.80.Jk, 98.80.Es, 95.36.+x
See AlsoSee Also: Zoltán Keresztes, László Á. Gergely, Alexander Yu. Kamenshchik, Vittorio Gorini, and David Polarski, Will the tachyonic universe survive the big brake?, Phys. Rev. D 82, 123534 (2010). |
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