期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 406, 期 1, 页码 14-21出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2010.16866.x
关键词
cosmic background radiation; cosmology: observations; large-scale structure of Universe
资金
- PPARC
- National Aeronautics and Space Administration
- National Science Foundation
- STFC [ST/G001979/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G001979/1] Funding Source: researchfish
We estimate the local density field in redshift shells to a maximum redshift of z = 0.3, using photometric redshifts for the Two-Micron All-Sky Survey galaxy catalogue, matched to optical data from the SuperCOSMOS galaxy catalogue. This density-field map is used to predict the integrated Sachs-Wolfe (ISW) cosmic microwave background (CMB) anisotropies that originate within the volume at z < 0.3. We investigate the impact of this estimated ISW foreground signal on large-scale anomalies in the Wilkinson Microwave Anisotropy Probe (WMAP) CMB data. We find that removal of the foreground ISW signal from WMAP data reduces the significance of a number of reported large-scale anomalies in the CMB, including the low quadrupole power and the apparent alignment between the CMB quadrupole and octopole.
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