Testing $\Lambda$CDM with eBOSS data using a model independent diagnostic

Abstract

The $Om3$ diagnostic (Shafieloo et al. 2012) tests the consistency of the cosmological constant as a candidate for dark energy using Baryon Acoustic Oscillation (BAO) data. An important feature of $Om3$ is that it is independent of any parametric assumption for dark energy, neither does it depend upon the dynamics of the Universe during the pre-recombination nor post-recombination eras. In other words, $Om3$ can be estimated using BAO observables and used either to confirm or falsify the cosmological constant independently of the value of the Hubble constant $H_0$ (expansion rate at $z=0$), and the comoving sound horizon at the baryon drag epoch, $r_d$ (which is a function of the physics of the Universe prior to recombination). Consequently, $Om3$ can play a key role in identifying the nature of dark energy (DE) regardless of the existing tensions in the standard model of cosmology and the possible presence of systematics in some of the data sets. We revisit $Om3$ using the most recent BAO observables from the eBOSS survey in order to test the consistency of the cosmological constant with this data. Our results show the consistency of dark energy being the cosmological constant. Moreover, with eBOSS data, we have achieved a precision of $1.5\%$ for this three-point diagnostic. This demonstrates that $Om3$ can be a potent diagnostic of dark energy when used in conjunction with the high precision data expected from forthcoming large scale structure surveys such as the Dark Energy Spectroscopic Instrument (DESI) and Euclid.

arXiv comment8 pages, 1 figure, 4 tables, accepted for publication in the Physical Review D

References in corpus (20)

• 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
• A 2.4% Determination of the Local Value of the Hubble Constant
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• Reconstructing Dark Energy
• Two new diagnostics of dark energy
• Model independent evidence for dark energy evolution from Baryon Acoustic Oscillations
• A Simple Phenomenological Emergent Dark Energy Model can Resolve the Hubble Tension
• A litmus test for Lambda
• Model independent tests of the standard cosmological model
• Scalar-tensor theories of gravity, neutrino physics, and the $H_0$ tension
• Implications of a transition in the dark energy equation of state for the $H_0$ and ${\sigma }_8$ tensions
• A new null diagnostic customized for reconstructing the properties of dark energy from BAO data
• Testing the Mutual Consistency of the Pantheon and SDSS/eBOSS BAO Data Sets with Gaussian Processes
• One spectrum to cure them all: Signature from early Universe solves major anomalies and tensions in cosmology
• Inflation Wars: A New Hope
• Parameter discordance in Planck CMB and low-redshift measurements: projection in the primordial power spectrum
• Discordances in cosmology and the violation of slow-roll inflationary dynamics