Direct reconstruction of dynamical dark energy from observational Hubble parameter data

Abstract

Reconstructing the evolution history of the dark energy equation of state parameter $w(z)$ directly from observational data is highly valuable in cosmology, since it contains substantial clues in understanding the nature of the accelerated expansion of the Universe. Many works have focused on reconstructing $w(z)$ using Type Ia supernova data, however, only a few studies pay attention to Hubble parameter data. In the present work, we explore the merit of Hubble parameter data and make an attempt to reconstruct $w(z)$ from them through the principle component analysis approach. We find that current Hubble parameter data perform well in reconstructing $w(z)$; though, when compared to supernova data, the data are scant and their quality is worse. Both $\Lambda$CDM and evolving $w(z)$ models can be constrained within $10\%$ at redshifts $z\lesssim 1.5$ and even $5\%$ at redshifts 0.1 $\lesssim$ z $\lesssim$ 1 by using simulated $H(z)$ data of observational quality.

25 pages, 11 figures

References in corpus (14)

• A 6% measurement of the Hubble parameter at $z\sim 0.45$: direct evidence of the epoch of cosmic re-acceleration
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
• Two new diagnostics of dark energy
• Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
• Nonparametric Dark Energy Reconstruction from Supernova Data
• Power of Observational Hubble Parameter Data: a Figure of Merit Exploration
• Examining the evidence for dynamical dark energy
• Standard rulers, candles, and clocks from the low-redshift Universe
• Nonparametric reconstruction of dynamical dark energy via observational Hubble parameter data
• The Atacama Cosmology Telescope: The LABOCA/ACT Survey of Clusters at All Redshifts
• Reconstructing the equation of state and density parameter for dark energy from combined analysis of recent SNe Ia, OHD and BAO data
• Reconstructing Dark Energy : A Comparison of Cosmological Parameters

Cited by in corpus (8)

• Is there a concordance value for $H_0$?
• Model-independent cosmic acceleration and type Ia supernovae intrinsic luminosity redshift dependence
• Probing Dark Energy in The scope of Bianchi type I Spacetime
• Reconstruction of late-time cosmology using Principal Component Analysis
• Reconstructing equation of state of dark energy with principal component analysis
• A Unified Model of Dark Energy Based on the Mandelstam-Tamm Uncertainty Relation
• Inference of cosmological models with principal component analysis
• Can the Dark-Matter Deficit in the High-Redshift Galaxies Explain the Persistent Discrepancy in Hubble Constants?