Estimating the uncorrelated dark energy evolution in the Planck era

Abstract

The equation of state (EOS), $w(z)$, is the most important parameter of dark energy. We reconstruct the evolution of this EOS in a model-independent way using the latest cosmic microwave background (CMB) data from Planck and other observations, such as type Ia supernovae (SNe Ia), the baryonic acoustic oscillation measurements (SDSS, 6dF, BOSS, and WiggleZ), and the Hubble parameter value $H(z)$. The results show that the EOS is consistent with the cosmological constant at the $2\sigma$ confidence level, not preferring a dynamical dark energy. The uncorrelated EOS of dark energy constraints from Planck CMB data are much tighter than those from the WMAP 9-year CMB data.

5 pages, 5 figures, accepted for publication in Phys. Rev. D

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Cited by in corpus (11)

• Gamma-ray Burst Cosmology
• Measuring dark energy with the $E_{\mathrm{iso}}-E_{\mathrm{p}}$ correlation of gamma-ray bursts using model-independent methods
• A Comparison of Thawing and Freezing Dark Energy Parametrizations
• Dark energy equation of state parameter and its variation at low redshifts
• Cosmological test using strong gravitational lensing systems
• GRBs and fundamental physics
• Investigating the Possibility of a Turning Point in the Dark Energy Equation of State
• Constraints on Dark Energy from New Observations including Pan-STARRS
• Influence of the correlation prior on reconstruction of the dark energy equation of state
• Calibrating the effective magnitudes of type Ia supernovae with a model-independent method
• GRB Cosmology and Self-organized Criticality in GRBs