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General Relativity and Gravitation

, Volume 40, Issue 2–3, pp 285–300 | Cite as

Dark energy degeneracies in the background dynamics

  • Renée HlozekEmail author
  • Marina Cortês
  • Chris Clarkson
  • Bruce Bassett
Research Article

Abstract

We discuss degeneracies between dark energy and cosmic parameters using a fully non-perturbative and non-parametric approach. This allows us to examine the knock-on bias induced in the reconstructed dark energy equation of state, w(z), if there is a bias in the cosmic curvature or dark matter content. Assuming perfect Hubble, distance and volume measurements, we show that for z  >  1, the bias in w(z) is up to two orders of magnitude larger than the corresponding errors in Ω k or Ω m .

Keywords

Dark Energy Dark Energy Model Spatial Curvature Background Dynamic Error Ellipse 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Renée Hlozek
    • 1
    • 3
    Email author
  • Marina Cortês
    • 1
    • 2
  • Chris Clarkson
    • 1
  • Bruce Bassett
    • 1
    • 3
  1. 1.Cosmology and Gravity Group, Department Mathematics and Applied MathematicsUniversity of Cape TownRondeboschSouth Africa
  2. 2.Astronomy CentreUniversity of SussexBrightonUK
  3. 3.South African Astronomical ObservatoryCape TownSouth Africa

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