Integrated Sachs-Wolfe map recovery from NVSS and WMAP 7yr data
arXiv:1208.2350 · doi:10.1093/mnras/sts600
Abstract
We present a map of the Cosmic Microwave Background (CMB) anisotropies induced by the late Integrated Sachs Wolfe effect. The map is constructed by combining the information of the WMAP 7-yr CMB data and the NRAO VLA Sky Survey (NVSS) through a linear filter. This combination improves the quality of the map that would be obtained using information only from the Large Scale Structure data. In order to apply the filter, a given cosmological model needs to be assumed. In particular, we consider the standard LCDM model. As a test of consistency, we show that the reconstructed map is in agreemet with the assumed model, which is also favoured against a scenario where no correlation between the CMB and NVSS catalogue is considered.
6 pages, 4 figures. Minor revision, accepted for publication in MNRAS
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- Removal of two large scale Cosmic Microwave Background anomalies after subtraction of the Integrated Sachs Wolfe effect
- Measuring ISW with next-generation radio surveys
- Integrated Sachs-Wolfe map reconstruction in the presence of systematic errors
- Full sky Integrated Sachs-Wolfe maps for the MICE Grand Challenge lightcone simulation
- On the recovery of ISW fluctuations using large-scale structure tracers and CMB temperature and polarization anisotropies
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