Lensing reconstruction from a patchwork of polarization maps

Abstract

The lensing signals involved in CMB polarization maps have already been measured with ground-based experiments such as SPTpol and POLARBEAR, and would become important as a probe of cosmological and astrophysical issues in the near future. Sizes of polarization maps from ground-based experiments are, however, limited by contamination of long wavelength modes of observational noise. To further extract the lensing signals, we explore feasibility of measuring lensing signals from a collection of small sky maps each of which is observed separately by a ground-based large telescope, i.e., lensing reconstruction from a patchwork map of large sky coverage organized from small sky patches. We show that, although the B-mode power spectrum obtained from the patchwork map is biased due to baseline uncertainty, bias on the lensing potential would be negligible if the B-mode on scales larger than the blowup scale of $1/f$ noise is removed in the lensing reconstruction. As examples of cosmological applications, we also show 1) the cross-correlations between the reconstructed lensing potential and full-sky temperature/polarization maps from satellite missions such as PLANCK and LiteBIRD, and 2) the use of the reconstructed potential for delensing B-mode polarization of LiteBIRD observation.

22 pages, 11 figures, replaced to match the published version in JCAP

References in corpus (31)

• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Efficient Computation of CMB anisotropies in closed FRW models
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• The Primordial Inflation Explorer (PIXIE): A Nulling Polarimeter for Cosmic Microwave Background Observations
• Gravitational Lensing Effect on Cosmic Microwave Background Polarization
• CMB Lensing Reconstruction on the Full Sky
• Weak Lensing of the CMB: A Harmonic Approach
• Reconstruction of lensing from the cosmic microwave background polarization
• Detection of B-mode Polarization in the Cosmic Microwave Background with Data from the South Pole Telescope
• A limit on the detectability of the energy scale of inflation
• A measurement of gravitational lensing of the microwave background using South Pole Telescope data
• Gravitational lensing as a contaminant of the gravity wave signal in CMB
• Separation of Gravitational-Wave and Cosmic-Shear Contributions to Cosmic Microwave Background Polarization
• The Microwave Background Bispectrum, Paper II: A Probe of the Low Redshift Universe
• The shape of the CMB lensing bispectrum
• Measurement of the Cosmic Microwave Background Polarization Lensing Power Spectrum with the POLARBEAR experiment
• Lensing Reconstruction with CMB Temperature and Polarization
• Delensing CMB Polarization with External Datasets
• Lensed CMB power spectra from all-sky correlation functions
• Bias-Hardened CMB Lensing
• CMB temperature lensing power reconstruction
• Reconstructing Patchy Reionization from the Cosmic Microwave Background
• Direct Signature of Evolving Gravitational Potential from Cosmic Microwave Background
• Cosmic Shear of the Microwave Background: The Curl Diagnostic
• Simple foreground cleaning algorithm for detecting primordial B-mode polarization of the cosmic microwave background
• Full-sky lensing reconstruction of gradient and curl modes from CMB maps
• Full-sky CMB lensing reconstruction in presence of sky-cuts
• Bias-Hardened CMB Lensing with Polarization
• Decomposing CMB lensing power with simulation
• Constraining cosmic string parameters with curl mode of CMB lensing
• CMB lensing reconstruction using cut sky polarization maps and pure-$B$ modes

Cited by in corpus (24)

• Delensing the CMB with the Cosmic Infrared Background
• Internal delensing of Planck CMB temperature and polarization
• The Benefits of CMB Delensing
• How Well Can Future CMB Missions Constrain Cosmic Inflation?
• Impact of polarised extragalactic sources on the measurement of CMB B-mode anisotropies
• The Simons Observatory: Constraining inflationary gravitational waves with multi-tracer B-mode delensing
• Delensing Cosmic Microwave Background B-modes with the Square Kilometre Array Radio Continuum Survey
• CMB internal delensing with general optimal estimator for higher-order correlations
• Minimizing gravitational lensing contributions to the primordial bispectrum covariance
• Impact of internal-delensing biases on searches for primordial B-modes of CMB polarisation
• Limitations of CMB B-mode template delensing
• Comparison of delensing methodologies and assessment of the delensing capabilities of future experiments
• LiteBIRD Science Goals and Forecasts: Improving Sensitivity to Inflationary Gravitational Waves with Multitracer Delensing
• Non-Gaussian Structure of B-mode Polarization after Delensing
• Optimal filtering for CMB lensing reconstruction
• A numerical study of observational systematic errors in lensing analysis of CMB polarization
• The Superhorizon Test of Future B-mode Experiments
• New probe of inflationary gravitational waves: cross-correlations of lensed primary CMB B-modes with large-scale structure
• Improving Cosmic Birefringence Constraints via Delensing
• Enhancing Primordial B-mode Detection: Comprehensive Delensing Pipelines for Improved Sensitivity to $r$
• Delensing for Precision Cosmology: Optimizing Future CMB B-mode Surveys to Constrain r
• Systematic effects on lensing reconstruction from a patchwork of CMB polarization maps
• Running the small-correlated-against-large estimator at scale: Applications of small-scale CMB lensing estimators on realistic simulations
• A Demonstration of Spectral Level Reconstruction of Intrinsic $B$-mode Power