Baryons and weak lensing power spectra

被引：124

作者：

White, M ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

来源：

ASTROPARTICLE PHYSICS | 2004年 / 22卷 / 02期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

cosmology; lensing; large-scale structures;

D O I：

10.1016/j.astropartphys.2004.06.001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We provide a simple toy model to elucidate the effects of baryonic cooling on predictions of the convergence power spectrum in weak gravitational lensing. Our model suggests that the effects of baryonic cooling on dark matter halo profiles can alter the dark matter power spectrum at k similar to 10h Mpc(-1) and lead to percent level changes in the convergence angular power spectrum at wavenumbers of several thousand. These effects would be measurable with planned weak lensing surveys and will impact constraints on cosmological parameters. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：211 / 217

页数：7

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