A new approach of estimating the Galactic thermal dust and synchrotron polarized emission template in the microwave bands

Abstract

The Internal Linear Combination (ILC) method has been extensively used to extract the cosmic microwave background (CMB) anisotropy map from foreground contaminated multi-frequency maps. However, the performance of simple ILC is limited and can be significantly improved by heavily constraint equations, dubbed cILC. The standard ILC and cILC works on the spin-0 field. Recently, a generalized version of ILC is developed to estimate polarization maps in which the quantity $Q\pm iU$ is combined at multiple frequencies using complex coefficients called Polarization ILC (PILC). A statistical moment expansion method has recently been developed for high precision modelling of the Galactic foregrounds. This paper develops a semi-blind component separation method combining the moment approach of foreground modelling with a generalized version of the PILC method for heavily constraint equations. The algorithm is developed in pixel space and performs for a spin-2 field. We employ this component separation technique in simultaneous estimation of Stokes $Q$, $U$ maps of the thermal dust at 353 GHz and synchrotron at 30 GHz over 78 % of the sky. We demonstrate the performance of the method on three sets of absolutely calibrated simulated maps at WMAP and planck frequencies with varying foreground models.

arXiv comment23 pages, 16 figures, Submitted to MNRAS

References in corpus (51)

• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• The Simons Observatory: Science goals and forecasts
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Foreground Emission
• Planck 2013 results. XI. All-sky model of thermal dust emission
• How to measure CMB power spectra without losing information
• Microwave ISM Emission Observed by WMAP
• Joint Bayesian component separation and CMB power spectrum estimation
• A limit on the detectability of the energy scale of inflation
• A full sky, low foreground, high resolution CMB map from WMAP
• On Foreground Removal from the Wilkinson Microwave Anisotropy Probe Data by an Internal Linear Combination Method: Limitations and Implications
• An Anomalous Component of Galactic Emission
• The Python Sky Model: software for simulating the Galactic microwave sky
• Separation of anomalous and synchrotron emissions using WMAP polarization data
• Multi-Detector Multi-Component spectral matching and applications for CMB data analysis
• CMB and SZ effect separation with Constrained Internal Linear Combinations
• Planck early results: first assessment of the High Frequency Instrument in-flight performance
• Planck intermediate results. XXII. Frequency dependence of thermal emission from Galactic dust in intensity and polarization
• MILCA, a Modified Internal Linear Combination Algorithm to extract astrophysical emissions from multi-frequency sky maps
• Foreground component separation with generalised ILC
• Xspect, estimation of the angular power spectrum by computing cross-power spectra with analytical error bars
• Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Foreground Polarization
• Planck early results. III. First assessment of the Low Frequency Instrument in-flight performance
• Rethinking CMB foregrounds: systematic extension of foreground parameterizations
• Exploring Cosmic Origins with CORE: Survey requirements and mission design
• Mapping the Magnetic Interstellar Medium in Three Dimensions Over the Full Sky with Neutral Hydrogen
• A needlet ILC analysis of WMAP 7-year data: estimation of CMB temperature map and power spectrum
• Dust models compatible with Planck intensity and polarization data in translucent lines of sight
• The S-PASS view of polarized Galactic Synchrotron at 2.3 GHz as a contaminant to CMB observations
• Multi-resolution internal template cleaning: An application to the Wilkinson Microwave Anisotropy Probe 7-yr polarization data
• Modeling Thermal Dust Emission with Two Components: Application to the Planck HFI Maps
• The Quest for Microwave Foreground X
• Modeling the Anomalous Microwave Emission with Spinning Nanoparticles: No PAHs Required
• Exploring Cosmic Origins with CORE: B-mode Component Separation
• Joint Planck and WMAP CMB Map Reconstruction
• QUIJOTE Scientific Results. II. Polarisation Measurements of the Microwave Emission in the Galactic molecular complexes W43 and W47 and supernova remnant W44
• A needlet ILC analysis of WMAP 9-year polarisation data: CMB polarisation power spectra
• Polarized galactic synchrotron and dust emission and their correlation
• Evidence for Line-of-Sight Frequency Decorrelation of Polarized Dust Emission in $Planck$ Data
• Joint 3D modelling of the polarized Galactic synchrotron and thermal dust foreground diffuse emission
• Modelling and simulation of large-scale polarized dust emission over the southern Galactic cap using the GASS HI data
• Statistical description of dust polarized emission from the diffuse interstellar medium -- A RWST approach
• Mapping the relativistic electron gas temperature across the sky
• Combining ILC and moment expansion techniques for extracting average-sky signals and CMB anisotropies
• Impact of calibration errors on CMB component separation using FastICA and ILC
• CMB polarization map derived from the WMAP 5 year data through Harmonic Internal Linear Combination
• SILC: a new Planck Internal Linear Combination CMB temperature map using directional wavelets
• Tensor Anisotropies in an Open Universe
• Exploring two-spin internal linear combinations for the recovery of the CMB polarization
• Dust polarization modeling at large-scale over the Northern Galactic cap using EBHIS and Planck data