Constraining dark energy evolution with gravitational lensing by large scale structures

2003/06/02 by K. Benabed, Karim Benabed, Ludovic Van Waerbeke · 1 citation
Physics and Astronomy · #Anisotropy #Astronomy #Astrophysics #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark matter #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gamma-ray bursts and supernovae #Gravitational lens #Hubble's law #Physics #Quantum mechanics #Quintessence #Redshift #Sigma #Weak gravitational lensing #astro-ph

paper · pdf · doi:10.1103/physrevd.70.123515

published as Phys.Rev.D70:123515,2004 · Submitted to Physical Review D

arxiv created 2003/06/02 · openalex publication_date 2004/12/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study the sensitivity of weak lensing by large scale structures as a probe of the evolution of dark energy. We explore a two-parameters model of dark energy evolution, inspired by tracking quintessence models. To this end, we compute the likelihood of a few fiducial models with varying and nonvarying equation of states. For the different models, we investigate the dark energy parameter degeneracies with the mass power spectrum shape \ensuremathΓ, normalization \ensuremathσ₈, and with the matter mean density \ensuremathΩ_M. We find that degeneracies are such that weak lensing turns out to be a good probe of dark energy evolution, even with limited knowledge on \ensuremathΓ, \ensuremathσ₈, and \ensuremathΩ_M. This result is a strong motivation for performing large scale structure simulations beyond the simple constant dark energy models, in order to calibrate the nonlinear regime accurately. Such calibration could then be used for any large scale structure tests of dark energy evolution. Prospective for the Canada France Hawaii Telescope Legacy Survey and Super-Novae Acceleration Probe are given. These results complement nicely the cosmic microwave background and supernovae constraints.

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Cited by

• Detection of large-scale intrinsic ellipticity--density correlation from the Sloan Digital Sky Survey and implications for weak lensing surveys