Tachyon cosmology, supernovae data and the Big Brake singularity
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. Among the set of the trajectories of the model which are compatible with the data there is a consistent subset...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
American Physical Society
2009
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| Sorozat: | PHYSICAL REVIEW D
79 |
| doi: | 10.1103/PhysRevD.79.083504 |
| mtmt: | 1280944 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/7962 |
| Tartalmi kivonat: | 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. 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. |
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| Terjedelem/Fizikai jellemzők: | Terjedelem: 8 p.-Azonosító: 083504 |
| ISSN: | 1550-7998 |