Effect of hot baryons on the weak-lensing shear power spectrum

被引：123

作者：

Zhan, H ^{[1
]}

Knox, L ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

ASTROPHYSICAL JOURNAL | 2004年 / 616卷 / 02期

关键词：

cosmology : theory; dark matter; galaxies : clusters : general; gravitational lensing; large-scale structure of universe;

D O I：

10.1086/426712

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the impact of the intracluster medium on the weak-lensing shear power spectrum (PS). Using a halo model we find that, compared to the dark matter-only case, baryonic pressure leads to a suppression of the shear PS on the order of a few percent or more for lgreater than or similar to1000. Cooling/cooled baryons and the intergalactic medium can further alter the shear PS. Therefore, the interpretation of future precision weak-lensing data at high multipoles must take into account the effects of baryons.

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页码：L75 / L78

页数：4

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