Correlation of CMB with large-scale structure. II. Weak lensing

被引：171

作者：

Hirata, Christopher M. ^{[1
]}

Ho, Shirley ^{[2
]}

Padmanabhan, Nikhil ^{[3
]}

Seljak, Uros ^{[4
,5
,6
]}

Bahcall, Neta A. ^{[2
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

[2] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[4] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland

[5] Abdus Salaam Int Ctr Theoret Phys, I-34014 Trieste, Italy

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

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 04期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

D O I：

10.1103/PhysRevD.78.043520

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the cot-relation of gravitational lensing of the cosmic microwave background (CMB) with several tracers of large-scale structure, including luminous red galaxies (LRGs), quasars, and radio Sources. The lensing field is reconstructed based on the CMB maps from the Wilkinson Microwave Anisotropy Probe (WMAP) satellite; the LRGs and quasars are observed by the Sloan Digital Sky Survey (SDSS); and the radio sources are observed in the NRAO VLA Sky Survey (NVSS). Combining all three large-scale Structure samples, we find evidence for a positive cross correlation at the 2.5 sigma level (1.8 sigma for the SDSS samples and 2.1 sigma for NVSS); the cross correlation amplitude is 1.06 +/- 0.42 times that expected for the WMAP cosmological parameters. Our analysis extends other recent analyses in that we carefully determine bias-weighted redshift distribution of the Sources. which is needed for a meaningful cosmological interpretation of the detected signal. We investigate contamination of the signal by galactic emission, extragalactic radio and infrared sources, thermal and kinetic Sunyaev-Zel'dovich effects, and the Rees-Sciama effect, and find all of them to be negligible.

引用

页数：33

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