Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-16575
Hirata, C; Ho, S; Padmanabhan, N; Seljak, U; Bahcall, N A (2008). Correlation of CMB with large-scale structure. II. Weak lensing. Physical Review D, 78(4):043520.
PDF (Accepted manuscript, Version 2)
View at publisher
PDF (Accepted manuscript, Version 1)
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.
104 downloads since deposited on 13 Mar 2009
32 downloads since 12 months
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Institute for Computational Science|
|Dewey Decimal Classification:||530 Physics|
|Deposited On:||13 Mar 2009 12:33|
|Last Modified:||27 Nov 2013 21:42|
|Publisher:||American Physical Society|
Users (please log in): suggest update or correction for this item
Repository Staff Only: item control page