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

Journal Article · Fri Aug 15 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.043520· OSTI ID:21250468

Hirata, Christopher M ^[1]; Ho, Shirley; Bahcall, Neta A ^[2]; Padmanabhan, Nikhil ^[3]; Seljak, Uros ^[4]

---

1. California Institute of Technology M/C 130-33, Pasadena, California 91125 (United States)
2. Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, New Jersey 08544 (United States)
3. Lawrence Berkeley National Labs, 1 Cyclotron Road Mississippi 50R-5032, Berkeley, California 94720 (United States)
4. Institute for Theoretical Physics, University of Zurich, 8057 Zurich (Switzerland)

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{+-}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.

• OSTI ID: 21250468
• Journal Information: Physical Review. D, Particles Fields, Vol. 78, Issue 4; Other Information: DOI: 10.1103/PhysRevD.78.043520; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
AMPLITUDES
ANISOTROPY
CONTAMINATION
CORRELATIONS
DISTRIBUTION
EMISSION
GALAXIES
GRAVITATIONAL LENSES
LUMINOSITY
QUASARS
RADIO GALAXIES
RED SHIFT
RELICT RADIATION
SATELLITES
WEAK INTERACTIONS