Cross-correlation of CMB with large-scale structure: Weak gravitational lensing
- Department of Physics, Jadwin Hall, Princeton University, Princeton, New Jersey 08544 (United States)
- Princeton University Observatory, Princeton University, Princeton, New Jersey 08544 (United States)
- Apache Point Observatory, 2001 Apache Point Road, Sunspot, New Mexico 88349-0059 (United States)
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. The CMB lensing reconstruction is performed using the first year of Wilkinson Microwave Anisotropy Probe data, and the galaxy maps are obtained using the Sloan Digital Sky Survey imaging data. We find no detection of lensing; our constraint on the galaxy bias derived from the galaxy-convergence cross-spectrum is b{sub g}=1.81{+-}1.92 (1{sigma}, statistical) as compared to the expected result of b{sub g}{approx}1.8 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.
- OSTI ID:
- 20697972
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 70, Issue 10; Other Information: DOI: 10.1103/PhysRevD.70.103501; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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