2008/01/07 by Renée Hložek, Renée Hlozek, Marina Cortês +3
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Geophysics and Gravity Measurements #astro-ph #gr-qc
paper · pdf · doi:10.1007/s10714-007-0548-6
published as General Relativity and Gravitation, Volume 40, Issue 2-3, pp. 285-300 (2008) · 10 pages, 8 figures. Invited Review for special issue of General Relativity and Gravitation issue on Dark Energy, eds. G. F.R Ellis et al
openalex publication_date 2008/01/07 · arxiv created 2008/01/24 · arxiv updated 2009/12/01 · openalex created_date 2020/11/23 · openalex updated_date 2026/07/29
We study the degeneracies between dark energy dynamics, dark matter and curvature using a non-parametric and non-perturbative approach. This allows us to examine the knock-on bias induced in the reconstructed dark energy equation of state, w(z), when there is a bias in the cosmic curvature or dark matter content, without relying on any specific parameterisation of w. Even 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 Omegak or Omegam. This highlights the importance of obtaining unbiased estimators of all cosmic parameters in the hunt for dark energy dynamics.