Dynamical dark energy in light of cosmic distance measurements II: a study using current observations

Abstract

We extract key information of dark energy from current observations of BAO, OHD and $H_0$, and find hints of dynamical behaviour of dark energy. In particular, a dynamical dark energy model whose equation of state crosses $-1$ is favoured by observations. We also find that the Universe has started accelerating at a lower redshift than expected.

10 pages, 4 figures; version accepted to RAA

References in corpus (5)

• Dynamics of dark energy
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon acoustic oscillations with Lyman-$\alpha$ forests
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic correlation function between redshifts 0.6 and 1

Cited by in corpus (9)

• Interpreting DESI 2024 BAO: late-time dynamical dark energy or a local effect?
• Quintom cosmology and modified gravity after DESI 2024
• Dynamical Dark Energy in light of the DESI DR2 Baryonic Acoustic Oscillations Measurements
• The DESI DR1/DR2 evidence for dynamical dark energy is biased by low-redshift supernovae
• Does DESI DR2 challenge $\Lambda$CDM paradigm ?
• Gaussian-process reconstructions and model building of quintom dark energy from latest cosmological observations
• What if string theory has a de Sitter excited state?
• Assessing the Robustness of the CPL Parametrization to Basis and Prior Variations: Insights from DESI DR2 BAO Data
• Enhancing Cosmological Constraints by Two-dimensional $\beta$-cosmic-web Weighted Angular Correlation Functions