Ruling out the Modified Chaplygin Gas cosmologies

Ruling out the Modified Chaplygin Gas cosmologies

The Modified Chaplygin Gas (MCG) model belongs to the class of a unified models of dark energy (DE) and dark matter (DM). It is characterized by an equation of state (EoS) pc=Bρ−A/ρα, where the case B=0 corresponds to the Generalized Chaplygin Gas (GCG) model. Using a perturbative analysis and power...

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Veröffentlicht in:Physics letters. B 2011-01, Vol.694 (4-5), p.289-293
Hauptverfasser: Fabris, J.C., Velten, H.E.S., Ogouyandjou, C., Tossa, J.
Format: Artikel
Sprache:eng
Schlagworte:
Cosmology
Dark energy
Exact sciences and technology
Nuclear physics
Physics
The physics of elementary particles and fields
Unified models
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Zusammenfassung:The Modified Chaplygin Gas (MCG) model belongs to the class of a unified models of dark energy (DE) and dark matter (DM). It is characterized by an equation of state (EoS) pc=Bρ−A/ρα, where the case B=0 corresponds to the Generalized Chaplygin Gas (GCG) model. Using a perturbative analysis and power spectrum observational data we show that the MCG model is not a successful candidate for the cosmic medium unless B=0. In this case, it reduces to the usual GCG model.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2010.10.022