Cross-correlation of CMB with large-scale structure: Weak gravitational lensing

被引：71

作者：

Hirata, CM

Padmanabhan, N

Seljak, U

Schlegel, D

Brinkmann, J

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[2] Princeton Univ, Princeton Univ Observ, Princeton, NJ 08544 USA

[3] Apache Point Observ, Sunspot, NM 88349 USA

来源：

PHYSICAL REVIEW D | 2004年 / 70卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.70.103501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of a search for gravitational lensing of the cosmic microwave background (CMB) in cross-correlation with the projected density of luminous red galaxies. The CMB lensing reconstruction is performed using the first year of Wilkinson Microwave Anisotropy Probe data, and the galaxy maps are obtained using the Sloan Digital Sky Survey imaging data. We find no detection of lensing; our constraint on the galaxy bias derived from the galaxy-convergence cross-spectrum is b(g)=1.81+/-1.92 (1sigma, statistical) as compared to the expected result of b(g)similar to1.8 for this sample. We discuss possible instrument-related systematic errors and show that the galactic foregrounds are not important. We do not find any evidence for point-source or thermal Sunyaev-Zel'dovich effect contamination.

引用

页码：103501 / 1

页数：24

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