TITLE:
Cross-correlation of CMB with large-scale structure: weak gravitational lensing.
AUTHOR(S):
Christopher M. Hirata, Nikhil Padmanaban, Uros Seljak, and David Schlegel (Princeton Univ.); and Jonathan Brinkmann (Apache Point
Obs.)
DATE:
2004 May 31 (arXiv, v1, posted); 2004 Jun 02 (Phys. Rev. D, submitted); 2004 Aug 31 (revised); 2004 Sep 13 (Phys. Rev. D, accepted);
2004 Sep 14 (arXiv, v2, posted); 2004 Nov 03 (Phys. Rev. D, published).
AVAILABILITY:
arXiv astro-ph/0406004 (free);
PROLA (requires subscription).
PUBLICATION INFORMATION:
Physical Review D, 70, 103501 (2004), 24 pages.
ABSTRACT:
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 (LRGs). The CMB lensing reconstruction is performed using the first year of Wilkinson
Microwave Anisotropy Probe (WMAP) data, and the galaxy maps are obtained using the Sloan Digital Sky Survey (SDSS) imaging
data. We find no detection of lensing; our constraint on the galaxy bias derived from the galaxy-convergence cross-spectrum is
bg=1.81 +/- 1.92 (1s, statistical), as compared to the expected result of bg~1.7 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.
ADS BIBLIOGRAPHIC CODE: 2004PhRvD..70j3501H
COMMENTS:
SDSS Publication #391. An overview of the quadratic reconstruction methods used in this paper and a comparison to maximum likelihood
can be found in Hirata & Seljak (2003).