Gravitational lensing constraints on dynamical and coupled dark energy

2008/03/31 by G. La Vacca, L. P. L. Colombo
Physics and Astronomy · #Anisotropy #Astrophysics #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Coupling (piping) #Dark energy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gravitational lens #Optics #Physics #Polarization (electrochemistry) #Redshift #Weak gravitational lensing #astro-ph

paper · pdf · doi:10.1088/1475-7516/2008/04/007

published as JCAP 0804:007,2008 · 21 pages, 12 figures; version to appear in JCAP

openalex publication_date 2008/04/07 · arxiv created 2008/04/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Upcoming weak lensing (WL) surveys can be used to constrain dark energy (DE) properties, namely if tomographic techniques are used to improve their sensitivity. In this work, we use a Fisher matrix technique to compare the power of CMB anisotropy and polarization data with tomographic WL data, in constraining DE parameters. Adding WL data to available CMB data improves the detection of all cosmological parameters, but the impact is really strong when DE–DM coupling is considered, as WL tomography can then succeed to reduce the errors on some parameters by factors >10.

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