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Generalized Chaplygin gas model, supernovae and cosmic topology

Dec, 2005
8 pages
Published in:
  • Phys.Rev.D 73 (2006) 043504
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Abstract: (arXiv)
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 AsA_s parameter of the GCG model but does not lift the degeneracy of the α\alpha parameter.
  • 98.80.Jk
  • 98.80.-k
  • 98.80.Es
  • gas: Chaplygin
  • supernova
  • space-time: topology
  • geometry
  • cosmic background radiation
  • numerical calculations: interpretation of experiments
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