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arXiv · 1112.1495

Modeling of weak lensing statistics. II. Configuration-space statistics

Patrick Valageas·Masanori Sato·Takahiro Nishimichi
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Abstract

We investigate the performance of an analytic model of the 3D matter distribution, which combines perturbation theory with halo models, for weak-lensing configuration-space statistics. We compared our predictions for the weak-lensing convergence two-point and three-point correlation functions with numerical simulations and fitting formulas proposed in previous works. We also considered the second- and third-order moments of the smoothed convergence and of the aperture-mass. As in our previous study of Fourier-space weak-lensing statistics, we find that our model agrees better with simulations than previously published fitting formulas. Moreover, we recover the dependence on cosmology of these weak-lensing statistics and we can describe multi-scale moments. This approach allows us to obtain the quantitative relationship between these integrated weak-lensing statistics and the various contributions to the underlying 3D density fluctuations, decomposed over perturbative, two-halo, or one-halo terms.

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Patrick Valageas, Masanori Sato, Takahiro Nishimichi. 2012-05-22. Modeling of weak lensing statistics. II. Configuration-space statistics. https://doi.org/10.1051/0004-6361%2F201118587

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