Non-linear weak lensing forecasts

被引：16

作者：

Casarini, Luciano ^{[1
,2
]}

La Vacca, Giuseppe ^{[1
,2
]}

Amendola, Luca ^{[3
]}

Bonometto, Silvio A. ^{[1
,2
]}

Maccio, Andrea V. ^{[4
]}

机构：

[1] Milano Bicocca Univ, Dept Phys G Occhialini, I-20126 Milan, Italy

[2] Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20126 Milan, Italy

[3] Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany

[4] Max Planck Inst Astron, D-69117 Heidelberg, Germany

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2011年 / 03期

关键词：

dark energy experiments; cosmological simulations; weak gravitational lensing; dark energy theory; DIGITAL SKY SURVEY; DARK ENERGY; POWER SPECTRUM; COSMOLOGICAL CONSTRAINTS; MATTER; BARYONS; MODEL;

D O I：

10.1088/1475-7516/2011/03/026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 Lambda CDM models, implies substantial discrepancies with respect to results directly obtained from N-body simulations, when w(z) not equal -1. Discrepancies appear strong when using models with w' (z = 0) > 0, as fiducial models; they are however significant even in the neighborhood of Lambda CDM, where neglecting the degrees of freedom associated with the DE state equation can lead to a misestimate of the matter density parameter Omega(m).

引用

页数：21

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