Consistency Tests for the Cosmological Constant

2008/07/28 by Caroline Zunckel, Chris Clarkson · 9 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph

paper · pdf · doi:10.1103/physrevlett.101.181301

published as Phys.Rev.Lett.101:181301,2008 · 4 pages, 2 figures

arxiv created 2008/07/28 · openalex publication_date 2008/10/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We propose consistency tests for the cosmological constant which provide a direct observational signal if Lambda is wrong, regardless of the densities of matter and curvature. As an example of its utility, our flat case test can warn of a small transition of the equation of state w(z) from w(z)=-1 of 20% from SNAP (Supernova Acceleration Probe) quality data at 4-sigma, even when direct reconstruction techniques see virtually no evidence for deviation from Lambda. It is shown to successfully rule out a wide range of non-Lambda dark energy models with no reliance on knowledge of Omega_m using SNAP quality data and a large range for using 10;5 supernovae as forecasted for the Large Synoptic Survey Telescope.

Citations

• Reconstructing Dark Energy

Cited by

• Rendering dark energy void
• Searching for systematics in SNIa and galaxy cluster data using the cosmic duality relation
• Light propagation in statistically homogeneous and isotropic dust universes
• A model-independent null test on the cosmological constant
• WHAT ARE THE Omh2 (z1, z2) AND Om (z1, z2) DIAGNOSTICS TELLING US IN LIGHT OF H(z) DATA?
• Crossing statistic: reconstructing the expansion history of the universe
• Running Hubble tension and a H0 diagnostic
• Diagnosing Tsallis holographic dark energy models with interactions
• Improved null tests of ΛCDM and FLRW in light of DESI DR2

Related

• Calibration-independent consistency test of DESI DR2 BAO and SNIa
• Statistical consistency of a sign-switching vacuum energy with cosmological observations
• Varying fundamental constants cosmography
• The status of varying constants: a review of the physics, searches and implications
• The importance of local measurements for cosmology