CMB polarization map derived from the WMAP 5 year data through Harmonic Internal Linear Combination

Abstract

We have derived whole-sky CMB polarization maps from the WMAP 5 year polarization data, using the Harmonic Internal Linear Combination (HILC) method. Our HILC method incorporates spatial variability of linear weights in a natural way and yields continuous linear weights over the entire sky. To estimate the power spectrum of HILC maps, we have derived a unbiased quadratic estimator, which is similar to the WMAP team's cross power estimator, but in a more convenient form for HILC maps. From our CMB polarization map, we have obtained TE correlation and E mode power spectra without applying any mask. They are similar to the WMAP team's estimation and consistent with the WMAP best-fit $\Lambda$CDM model. Foreground reduction by HILC method is more effective for high resolution and low noise data. Hence, our HILC method will enable effective foreground reduction in polarization data from the Planck surveyor.

The whole sky CMB polarization map derived from the WMAP 5 year data is available in the HEALPix FITS format at http://www.nbi.dk/~jkim/hilc v3: matched with the accepted version, to appear in PRD. v4: fixed some pdf file problem

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• Multi-resolution internal template cleaning: An application to the Wilkinson Microwave Anisotropy Probe 7-yr polarization data
• A Comparison of Algorithms for the Construction of SZ Cluster Catalogues
• Impact of calibration errors on CMB component separation using FastICA and ILC
• Cosmological Alfvén waves in the recent CMB data, and the observational bound on the primordial vector perturbation
• An Improved Diffuse Foreground Subtraction by ILC method: CMB Map and Angular Power Spectrum using Planck and WMAP Observations
• Exploring two-spin internal linear combinations for the recovery of the CMB polarization
• Stable indications of relic gravitational waves in Wilkinson Microwave Anisotropy Probe data and forecasts for the Planck mission
• CMB component separation in the pixel domain
• CMB Polarization and Temperature Power Spectra Estimation using Linear Combination of WMAP 5-year Maps
• Recovering Cosmic Microwave Background Polarization Signals with Machine Learning
• Detection of relic gravitational waves in the CMB: Prospects for CMBPol mission
• "Internal Linear Combination" method for the separation of CMB from Galactic foregrounds in the harmonic domain
• Delensing for Precision Cosmology: Optimizing Future CMB B-mode Surveys to Constrain r
• Non-Gaussian Distribution and Clustering of Hot and Cold Pixels in the WMAP Five-Year Sky
• A new approach of estimating the Galactic thermal dust and synchrotron polarized emission template in the microwave bands