Real-time cosmology with SKA

Abstract

In this work, we investigate what role the redshift drift data of Square Kilometre Array (SKA) will play in the cosmological parameter estimation in the future. To test the constraint capability of the redshift drift data of SKA-only, the $\Lambda$CDM model is chosen as a reference model. We find that using the SKA1 mock data, the $\Lambda$CDM model can be loosely constrained, while the model can be well constrained when the SKA2 mock data are used. When the mock data of SKA are combined with the data of the European Extremely Large Telescope (E-ELT), the constraints can be significantly improved almost as good as the data combination of the type Ia supernovae observation (SN), the cosmic microwave background observation (CMB), and the baryon acoustic oscillations observation (BAO). Furthermore, we explore the impact of the redshift drift data of SKA on the basis of SN+CMB+BAO+E-ELT in the $\Lambda$CDM model, the $w$CDM model, the CPL model, and the HDE model. We find that the redshift drift measurement of SKA could help to significantly improve the constraints on dark energy and could break the degeneracy between the cosmological parameters. Therefore, we conclude that redshift-drift observation of SKA would provide a good improvement in the cosmological parameter estimation in the future and has the enormous potential to be one of the most competitive cosmological probes in constraining dark energy.

arXiv comment12 pages, 5 figures; accepted for publication in the European Physical Journal C

References in corpus (55)

• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• A Model of Holographic Dark Energy
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Effective Field Theory, Black Holes, and the Cosmological Constant
• Small Scale Cosmological Perturbations: An Analytic Approach
• The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints
• A Holographic Dark Energy Model from Ricci Scalar Curvature
• Constraints on holographic dark energy from type Ia supernova observations
• Statefinder diagnostic for holographic dark energy model
• Holographic dark energy models: A comparison from the latest observational data
• Cosmic dynamics in the era of Extremely Large Telescopes
• Gamma-Ray Bursts From Neutron Star Phase Transitions
• Direct Measurement of Cosmological Parameters from the Cosmic Deceleration of Extragalactic Objects
• Constraints on Holographic Dark Energy from Latest Supernovae, Galaxy Clustering, and Cosmic Microwave Background Anisotropy Observations
• Dynamical vacuum energy, holographic quintom, and the reconstruction of scalar-field dark energy
• Holographic Ricci dark energy: Current observational constraints, quintom feature, and the reconstruction of scalar-field dark energy
• Reconstructing holographic quintessence
• Agegraphic dark energy as a quintessence
• Holographic tachyon model
• Exploring the Dark Energy Redshift Desert with the Sandage-Loeb Test
• Holographic dark energy in a cyclic universe
• Comparison of dark energy models: A perspective from the latest observational data
• Search for sterile neutrinos in holographic dark energy cosmology: Reconciling Planck observation with the local measurement of the Hubble constant
• Comparison of dark energy models after Planck 2015
• Impacts of dark energy on weighing neutrinos: mass hierarchies considered
• Constraining dark energy with Hubble parameter measurements: an analysis including future redshift-drift observations
• The time evolution of cosmological redshift as a test of dark energy
• Impacts of dark energy on weighing neutrinos after Planck 2015
• Holographic dark energy in a universe with spatial curvature and massive neutrinos: a full Markov Chain Monte Carlo exploration
• Neutrinos in the holographic dark energy model: constraints from latest measurements of expansion history and growth of structure
• Sandage-Loeb test for the new agegraphic and Ricci dark energy models
• Real-time cosmography with redshift derivatives
• Holographic Ricci dark energy in Randall-Sundrum braneworld: Avoidance of big rip and steady state future
• New agegraphic dark energy as a rolling tachyon
• Probing dark energy with redshift-drift
• Prospect for constraining holographic dark energy with gravitational wave standard sirens from the Einstein Telescope
• Redshift drift exploration for interacting dark energy
• Revisiting the holographic dark energy in a non-flat universe: alternative model and cosmological parameter constraints
• Exploring holographic dark energy model with Sandage-Loeb test
• Exploring interacting holographic dark energy in a perturbed universe with parameterized post-Friedmann approach
• Diagnosing holographic dark energy models with statefinder hierarchy
• Parameter estimation with Sandage-Loeb test
• Comparing holographic dark energy models with statefinder
• Redshift drift constraints on holographic dark energy
• Quantifying the impact of future Sandage-Loeb test data on dark energy constraints
• Prospect for cosmological parameter estimation using future Hubble parameter measurements
• Breaking through the high redshift bottleneck of Observational Hubble parameter Data: The Sandage-Loeb signal Scheme
• Forecast and analysis of the cosmological redshift drift
• Revisit of constraints on dark energy with Hubble parameter measurements including future redshift drift observations
• Real time cosmology - A direct measure of the expansion rate of the Universe
• Power of the redshift drift on cosmological models and expansion history

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