Keresés
1 találatból megjelenítve: 1-3
Cím: Do supernovae favor tachyonic Big Brake instead de Sitter?
Szerző: ; ; ; ;
Dátum: 2010
Feltöltve: 2020-08-11
(2010)
We investigate whether a tachyonic scalar field, encompassing
both dark energy and dark matter-like features will drive our
universe towards a Big Brake singularity or a de Sitter
expansion. In doing this it is crucial ...
Cím: Tachyon cosmology, supernovae data and the Big Brake singularity
Szerző: ; ; ; ;
Dátum: 2009
Feltöltve: 2020-08-11
(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. Among the set of the trajectories ...
Cím: Will the tachyonic universe survive the big brake?
Szerző: ; ; ; ;
Dátum: 2010
Feltöltve: 2020-08-11
(2010)
We investigate a Friedmann universe filled with a tachyon scalar field, which behaved as dustlike matter in the past, while it is able to accelerate the expansion rate of the Universe at late times. The comparison with ...