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- Title
Mass Power Spectrum in a Universe Dominated by the Chaplygin Gas.
- Authors
Fabris, J.C.; Gonçalves, S.V.B.; de Souza, P.E.
- Abstract
The mass power spectrum for a Universe dominated by the Chaplygin gas is evaluated numerically from scales of the order of the Hubble horizon to 100 Mpc. The results are compared with a pure baryonic Universe and a cosmological constant model. In all three cases, the spectrum increases with k, the wavenumber of the perturbations. The slope of the spectrum is higher for the baryonic model and smaller for the cosmological constant model, the Chaplygin gas interpolating these two models. The results are analyzed in terms of the sound velocity of the Chaplygin gas and the moment the Universe begins to accelerate.
- Subjects
HUBBLE deep field; METAPHYSICAL cosmology; BARYONS
- Publication
General Relativity & Gravitation, 2002, Vol 34, Issue 12, p2111
- ISSN
0001-7701
- Publication type
Article
- DOI
10.1023/a:1021187518781