TY - JOUR
T1 - Non-linear weak lensing forecasts
AU - Casarini, Luciano
AU - La Vacca, Giuseppe
AU - Amendola, Luca
AU - Bonometto, Silvio A.
AU - MacCiò, Andrea V.
PY - 2011/3
Y1 - 2011/3
N2 - 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 Ωm.
AB - 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 Ωm.
KW - cosmological simulations
KW - dark energy experiments
KW - dark energy theory
KW - weak gravitational lensing
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U2 - 10.1088/1475-7516/2011/03/026
DO - 10.1088/1475-7516/2011/03/026
M3 - Article
AN - SCOPUS:79953654680
SN - 1475-7516
VL - 2011
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 3
M1 - 026
ER -