Generalized Chaplygin gas model, supernovae and cosmic topology

Details Generalized Chaplygin gas model, supernovae and cosmic topology Generalized Chaplygin gas model, supernovae and cosmic topology

2005-12-28

arxiv.org/abs/gr-qc/0512158v2

Phys.Rev.D73:043504,2006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Revtex 4, 8 pages, 10 figures, 1 table; version to match the published one

Scientific paper

10.1103/PhysRevD.73.043504

In this work we study to which extent the knowledge of spatial topology may place constraints on the parameters of the generalized Chaplygin gas (GCG) model for unification of dark energy and dark matter. By using both the Poincar\'e dodecahedral and binary octahedral spaces as the observable spatial topologies, we examine the current type Ia supernovae (SNe Ia) constraints on the GCG model parameters. We show that the knowledge of spatial topology does provide additional constraints on the $A_s$ parameter of the GCG model but does not lift the degeneracy of the $\alpha$ parameter.

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