CMB and foregrounds in WMAP first year data

Abstract

We perform a blind multi-component analysis of the WMAP 1 year foreground cleaned maps using SMICA (Spectral Matching Independent Component Analysis). We provide a new estimate of the CMB power spectrum as well as the amplitude of the CMB anisotropies across frequency channels. We show that the CMB anisotropies are compatible with temperature fluctuations as expected from the standard paradigm. The analysis also allows us to identify and separate a weak residual galactic emission present significantly in the Q-band outside of the Kp2 mask limits, and mainly concentrated at low galactic latitudes. We produce a map of this residual component by Wiener filtering using estimated parameters. The level of contamination of CMB data by this component is compatible with the WMAP team estimation of foreground residual contamination. In addition, the multi-component analysis allows us to estimate jointly the power spectrum of unresolved point source emission.

13 pages, 11 Postscript figures, submitted to MNRAS

References in corpus (18)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Foreground Emission
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectrum
• MASTER of the CMB Anisotropy Power Spectrum: A Fast Method for Statistical Analysis of Large and Complex CMB Data Sets
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Tests of Gaussianity
• A high resolution foreground cleaned CMB map from WMAP
• Extrapolation of Galactic Dust Emission at 100 Microns to CMBR Frequencies Using FIRAS
• A Full-Sky H-alpha Template for Microwave Foreground Prediction
• Cosmological-Parameter Determination with Microwave Background Maps
• Extragalactic Source Counts and Contributions to the Anisotropies of the Cosmic Microwave Background. Predictions for the Planck Surveyor mission
• Multi-Detector Multi-Component spectral matching and applications for CMB data analysis
• Foregrounds and CMB Experiments: I. Semi-analytical estimates of contamination
• CMBFAST for spatially closed universes
• Predictions on the angular power spectrum of clustered extragalactic point sources at CMB frequencies from flat and all--sky 2D-simulations
• Contributions of point extragalactic sources to the Cosmic Microwave Background bispectrum
• Sunyaev-Zeldovich effect in WMAP and its effect on cosmological parameters

Cited by in corpus (31)

• Planck 2013 results. XII. Component separation
• The pre-launch Planck Sky Model: a model of sky emission at submillimetre to centimetre wavelengths
• The non-Gaussian Cold Spot in WMAP: significance, morphology and foreground contribution
• CMB multipole measurements in the presence of foregrounds
• A needlet ILC analysis of WMAP 7-year data: estimation of CMB temperature map and power spectrum
• Fast and Efficient Template Fitting of Deterministic Anisotropic Cosmological Models Applied to WMAP Data
• CMB data analysis and sparsity
• WMAP 3yr data with the CCA: anomalous emission and impact of component separation on the CMB power spectrum
• Foreground Subtraction of Cosmic Microwave Background Maps using WI-FIT (Wavelet based hIgh resolution Fitting of Internal Templates)
• A blind estimation of the power spectrum of CMB anisotropy from WMAP
• Estimating the spectral indices of correlated astrophysical foregrounds by a second-order statistical approach
• Examining the Effect of the Map-Making Algorithm on Observed Power Asymmetry in WMAP Data
• Performance forecasts for the primordial gravitational wave detection pipelines for AliCPT-1
• Spectral distortions to the Cosmic Microwave Background from the recombination of hydrogen and helium
• Impact of calibration errors on CMB component separation using FastICA and ILC
• Statistical challenges in the analysis of Cosmic Microwave Background radiation
• Foreground Analysis Using Cross-Correlations of External Templates on the 7-year WMAP data
• CMB signal in WMAP 3yr data with FastICA
• Detecting Sunyaev-Zel'dovich clusters with PLANCK: III. Properties of the expected SZ-cluster sample
• New insights into foreground analysis of the WMAP five-year data using FASTICA
• CMB Polarization and Temperature Power Spectra Estimation using Linear Combination of WMAP 5-year Maps
• Effect of component separation on the temperature distribution of the CMB
• Recent developments in astrophysical and cosmological exploitation of microwave surveys
• Forecast of foreground cleaning strategies for AliCPT-1
• Foreground Maps in WMAP frequency bands
• Diffuse source separation in CMB observations
• Testing synchrotron models and frequency resolution in BINGO 21 cm simulated maps using GNILC
• Bandpass mismatch error for satellite CMB experiments II: Correcting for the spurious signal
• Cosmic Microwave Background anisotropies: the power spectrum and beyond
• Unbiased Primordial Gravitational Wave Inference from the CMB with SMICA
• The CMB angular power spectrum via component separation: a study on Planck data