TITLE:
Correlation of CMB with large-scale structure: II. Weak lensing.
AUTHOR(S):
Christopher Hirata (Caltech);
Shirley Ho (Princeton); Nikhil Padmanabhan (LBL); Uros Seljak (Zurich); Neta Bahcall (Princeton).
DATE:
2008 Jan 04 (arXiv, posted, v1);
2008 Feb 16 (Phys. Rev. D, submitted);
2008 May 25 (revised);
2008 May 29 (Phys. Rev. D, accepted);
2008 May 29 (arXiv, posted, v2);
2008 Aug 13 (Phys. Rev. D, published).
AVAILABILITY:
arXiv 0801.0644 (free);
APS (requires subscription).
PUBLICATION INFORMATION:
Phys. Rev. D, 78, 043520, 2008.
ABSTRACT:
We investigate the correlation 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 $1.06\pm 0.42$ 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.
ADS BIBLIOGRAPHIC CODE: N/A.
COMMENTS: SDSS Publication #852. Paper I is here.