Non-linear weak lensing forecasts

• Verfasst von: Casarini, Luciano [VerfasserIn]
• Verfasst von: Amendola, Luca [VerfasserIn]
• Titel: Non-linear weak lensing forecasts
• Verf.angabe: Luciano Casarini, Giuseppe La Vacca, Luca Amendola, Silvio A. Bonometto and Andrea V. Macciò
• E-Jahr: 2011
• Jahr: 16 March 2011
• Umfang: 21 S.
• Fussnoten: Gesehen am 13.11.2017
• Titel Quelle: Enthalten in: Journal of cosmology and astroparticle physics
• Ort Quelle: London : IOP, 2003
• Jahr Quelle: 2011
• Band/Heft Quelle: (2011), 3, Artikel-ID 026, Seite 1-21
• ISSN Quelle: 1475-7516
• DOI: doi:10.1088/1475-7516/2011/03/026
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565264908

Abstract

We investigate the impact of non-linear corrections on dark energy parameter estimation from weak lensing probes. We find that using halofit expressions, suited to ΛCDM models, implies substantial discrepancies with respect to results directly obtained from N -body simulations, when w ( z )≠−1. Discrepancies appear strong when using models with w '( z = 0) > 0, as fiducial models; they are however significant even in the neighborhood of ΛCDM, where neglecting the degrees of freedom associated with the DE state equation can lead to a misestimate of the matter density parameter Ω m .