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

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dc.creatorHirata, Christopher M.
dc.creatorHo, Shirley
dc.creatorPadmanabhan, Nikhil
dc.creatorSeljak, Uros
dc.creatorBahcall, Neta
dc.date2008-01-04
dc.date2008-05-30
dc.date.accessioned2026-07-07T11:54:59Z
dc.date.available2026-07-07T11:54:59Z
dc.descriptionWe 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 $2.5σ$ level ($1.8σ$ for the SDSS samples and $2.1σ$ 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.
dc.description34 pages, 6 figures, matches PRD accepted version
dc.identifierhttps://arxiv.org/abs/0801.0644
dc.identifierhttp://arxiv.org/abs/0801.0644
dc.identifierPhys.Rev.D78:043520,2008
dc.identifierdoi:10.1103/PhysRevD.78.043520
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205105
dc.subjectAstrophysics
dc.titleCorrelation of CMB with large-scale structure: II. Weak lensing
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