Finding Possibility of Dynamical Dark Energy with Hubble Parameters

Abstract

The Hubble parameter is a critical measurement in cosmology, which contains the most direct information of the cosmic expansion history. Since discrepancy is found between low redshift and high redshift estimations of Hubble constant, we are interested in whether that tension indicates dynamical dark energy. In this paper we emphasize that the observed Hubble parameters at various redshifts, along with observed Hubble constant, can help us in probing the evolutional behavior of the mysterious dark energy. Null hypothesis tests are carried out with two diagnostic approaches. We find out that, according to the present measurements of Hubble parameters, rejection of constant dark energy is captured at $1\sigma$ level from null tests with and without the observed value of Hubble constant.

arXiv comment5 pages,5 figures, revised version, accepted by MPLA

References in corpus (20)

• A 3% Solution: Determination of the Hubble Constant with the Hubble Space Telescope and Wide Field Camera 3
• Constraints on the redshift dependence of the dark energy potential
• Cosmic Chronometers: Constraining the Equation of State of Dark Energy. I: H(z) Measurements
• Improved constraints on the expansion rate of the Universe up to z~1.1 from the spectroscopic evolution of cosmic chronometers
• Constraining Cosmological Parameters Based on Relative Galaxy Ages
• The WiggleZ Dark Energy Survey: Joint measurements of the expansion and growth history at z < 1
• Two new diagnostics of dark energy
• Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
• Carnegie Hubble Program: A Mid-Infrared Calibration of the Hubble Constant
• Reconstruction of dark energy and expansion dynamics using Gaussian processes
• The Megamaser Cosmology Project: IV. A Direct Measurement of the Hubble Constant from UGC 3789
• Examining the evidence for dynamical dark energy
• Using H(z) data as a probe of the concordance model
• Null tests of the cosmological constant using supernovae
• The Megamaser Cosmology Project. V. An Angular Diameter Distance to NGC 6264 at 140 Mpc
• A new null diagnostic customized for reconstructing the properties of dark energy from BAO data
• Thermodynamic of the Ghost Dark Energy Universe
• Generalized Holographic Dark Energy and its Observational Constraints
• Nonparametric reconstruction of dynamical dark energy via observational Hubble parameter data
• Cyclic Cosmology from the Little Rip