Non-linear weak lensing forecasts

Details Non-linear weak lensing forecasts Non-linear weak lensing forecasts

2011-02-18

arxiv.org/abs/1102.3877v4

JCAP03(2011)026

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

20 pages, 11 figures, accepted for publication in JCAP

Scientific paper

10.1088/1475-7516/2011/03/026

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 LCDM models, implies substantial discrepancies with respect to results directly obtained from N-body simulations, when w(z)\neq-1. Discrepancies appear strong when using models with w'(z=0)>0, as fiducial models; they are however significant even in the neighborhood of LCDM, where neglecting the degrees of freedom associated with the DE state equation can lead to a misestimate of the matter density parameter \Omega_m.

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