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- Title
Brane Universes Tested by Supernovae Ia.
- Authors
Godlowski, Wlodzimierz; Szydlowski, Marek
- Abstract
We discuss observational constraints coming from supernovae Ia imposed on the behaviour of the Randall-Sundrum models. In the case of dust matter on the brane, the difference between the best-fit Perlmutter model with a Λ-term and the best-fit brane models becomes detectable for redshifts z > 1.2. It is interesting that brane models predict brighter galaxies for such redshifts which is in agreement with the measurement of the z = 1.7 supernova. We also demonstrate that the fit to supernovae data can also be obtained, if we admit the "super-negative" dark energy (phantom matter) p = -(4/3)... on the brane, where the dark energy in a way mimics the influence of the cosmological constant. It also appears that the dark energy enlarges the age of the universe which is demanded in cosmology. Finally, we propose to check for dark radiation and brane tension by the application of the angular diameter of galaxies minimum value test. We point out the existence of coincidence problem for the brane tension parameter.
- Subjects
FORCE &; energy; METAPHYSICAL cosmology; GALAXIES; SUPERNOVAE; ASTROPHYSICS; GENERAL relativity (Physics); RELATIVITY (Physics); GRAVITATION
- Publication
General Relativity & Gravitation, 2004, Vol 36, Issue 4, p767
- ISSN
0001-7701
- Publication type
Article
- DOI
10.1023/b:gerg.0000016923.83136.05