The Benefits of CMB Delensing
arXiv:2111.15036 · doi:10.1088/1475-7516/2022/04/020
Abstract
The effects of gravitational lensing of the cosmic microwave background (CMB) have been measured at high significance with existing data and will be measured even more precisely in future surveys. Reversing the effects of lensing on the observed CMB temperature and polarization maps provides a variety of benefits. Delensed CMB spectra have sharper acoustic peaks and more prominent damping tails, allowing for improved inferences of cosmological parameters that impact those features. Delensing reduces -mode power, aiding the search for primordial gravitational waves and allowing for lower variance reconstruction of lensing and other sources of secondary CMB anisotropies. Lensing-induced power spectrum covariances are reduced by delensing, simplifying analyses and improving constraints on primordial non-Gaussianities. Biases that result from incorrectly modeling nonlinear and baryonic feedback effects on the lensing power spectrum are mitigated by delensing. All of these benefits are possible without any changes to experimental or survey design. We develop a self-consistent, iterative, all-orders treatment of CMB delensing on the curved sky and demonstrate the impact that delensing will have with future surveys.
arXiv comment38 pages, 10 figures. Delensing implementation in CLASS: https://github.com/selimhotinli/class_delens. Fisher forecasting code: https://github.com/ctrendafilova/FisherLens
References in corpus (139)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Array Programming with NumPy
- Efficient Computation of CMB anisotropies in closed FRW models
- Planck 2018 results. X. Constraints on inflation
- The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
- Stable clustering, the halo model and nonlinear cosmological power spectra
- Halo Models of Large Scale Structure
- Dark Energy and the Accelerating Universe
- Large-Scale Structure of the Universe and Cosmological Perturbation Theory
- Planck 2018 results. I. Overview and the cosmological legacy of Planck
- The Simons Observatory: Science goals and forecasts
- Quintessence and the Rest of the World
- An All-Sky Analysis of Polarization in the Microwave Background
- Revising the Halofit Model for the Nonlinear Matter Power Spectrum
- Analytic model for galaxy and dark matter clustering
- Weak Gravitational Lensing of the CMB
- Massive neutrinos and cosmology
- Statistics of Cosmic Microwave Background Polarization
- Halo occupation numbers and galaxy bias
- Signature of Gravity Waves in Polarization of the Microwave Background
- The physics driving the cosmic star formation history
- A Probe of Primordial Gravity Waves and Vorticity
- Planck 2018 results. VIII. Gravitational lensing
- Adiabatic and entropy perturbations from inflation
- Cosmological Signature of New Parity-Violating Interactions
- The Hubble Hunter's Guide
- Mass Reconstruction with CMB Polarization
- Neutrinos in cosmology
- CMB Lensing Reconstruction on the Full Sky
- The effects of galaxy formation on the matter power spectrum: A challenge for precision cosmology
- CMB-S4 Science Case, Reference Design, and Project Plan
- An accurate halo model for fitting non-linear cosmological power spectra and baryonic feedback models
- Effects of Baryons and Dissipation on the Matter Power Spectrum
- Signatures of Relativistic Neutrinos in CMB Anisotropy and Matter Clustering
- Measuring primordial non-gaussianity without cosmic variance
- CMB-S4 Science Book, First Edition
- Massive Neutrinos and the Non-linear Matter Power Spectrum
- Quantifying the effect of baryon physics on weak lensing tomography
- A limit on the detectability of the energy scale of inflation
- How Massless Neutrinos Affect the Cosmic Microwave Background Damping Tail
- CMB-S4: Forecasting Constraints on Primordial Gravitational Waves
- The Angular Trispectrum of the CMB
- Gravitational lensing as a contaminant of the gravity wave signal in CMB
- The Coyote Universe Extended: Precision Emulation of the Matter Power Spectrum
- Acoustic Signatures in the Cosmic Microwave Background
- Dark Synergy: Gravitational Lensing and the CMB
- Separation of Gravitational-Wave and Cosmic-Shear Contributions to Cosmic Microwave Background Polarization
- Determining Neutrino Mass from the CMB Alone
- Towards a cosmological neutrino mass detection
- Toward Understanding CMB Anisotropies and Their Implications
- Planck 2018 results. VI. Cosmological parameters
- Faraday Rotation of Microwave Background Polarization by a Primordial Magnetic Field
- The influence of baryons on the clustering of matter and weak lensing surveys
- Systematic Bias in Cosmic Shear: Beyond the Fisher Matrix
- Mapping the Dark Matter through the CMB Damping Tail
- Calibrating the Nonlinear Matter Power Spectrum: Requirements for Future Weak Lensing Surveys
- Isocurvature Perturbations in Multiple Inflationary Models
- Analyzing weak lensing of the cosmic microwave background using the likelihood function
- Delensing CMB Polarization with External Datasets
- Analytic approach to the polarization of the cosmic microwave background in flat and open universes
- Phases of New Physics in the CMB
- A First Detection of the Acoustic Oscillation Phase Shift Expected from the Cosmic Neutrino Background
- Lensed CMB power spectra from all-sky correlation functions
- The Kinetic Sunyaev-Zel'dovich Effect from Reionization
- Baryons and weak lensing power spectra
- Effect of Hot Baryons on the Weak-Lensing Shear Power Spectrum
- Small-scale CMB Temperature and Polarization Anisotropies due to Patchy Reionization
- Figure of Merit for Dark Energy Constraints from Current Observational Data
- Parameter constraints from cross-correlation of CMB lensing with galaxy clustering
- Getting Around Cosmic Variance
- Reconstructing Patchy Reionization from the Cosmic Microwave Background
- Delensing the CMB with the Cosmic Infrared Background
- The influence of non-uniform reionization on the CMB
- How to De-Rotate the Cosmic Microwave Background Polarization
- Microwave polarization in the direction of galaxy clusters induced by the CMB quadrupole anisotropy
- Constraining Isocurvature Perturbations with CMB Polarization
- Lensing of the CMB: Non Gaussian aspects
- Cosmological Information from Lensed CMB Power Spectra
- Constraining local non-Gaussianities with kSZ tomography
- De-Rotation of the Cosmic Microwave Background Polarization: Full-Sky Formalism
- Looking through the same lens: shear calibration for LSST, Euclid & WFIRST with stage 4 CMB lensing
- Full covariance of CMB and lensing reconstruction power spectra
- CMB Delensing Beyond the B Modes
- DeepCMB: Lensing Reconstruction of the Cosmic Microwave Background with Deep Neural Networks
- Internal delensing of Planck CMB temperature and polarization
- Constraining a spatially dependent rotation of the Cosmic Microwave Background Polarization
- Demonstration of cosmic microwave background delensing using the cosmic infrared background
- Detecting patchy reionization in the CMB
- Reconstruction of the remote dipole and quadrupole fields from the kinetic Sunyaev Zel'dovich and polarized Sunyaev Zel'dovich effects
- On the joint analysis of CMB temperature and lensing-reconstruction power spectra
- Non-Gaussian structure of the lensed CMB power spectra covariance matrix
- Bayesian delensing delight: sampling-based inference of the primordial CMB and gravitational lensing
- Bayesian delensing of CMB temperature and polarization
- Baryonic effects for weak lensing. Part II. Combination with X-ray data and extended cosmologies
- B-mode CMB Polarization from Patchy Screening during Reionization
- Optimal CMB Lensing Reconstruction and Parameter Estimation with SPTpol Data
- Weak Lensing of the CMB: Sampling Errors on B-Modes
- Magnification-Temperature Correlation: the Dark Side of ISW Measurements
- A Demonstration of Improved Constraints on Primordial Gravitational Waves with Delensing
- The Signature of Patchy Reionization in the Polarization Anisotropy of the CMB
- What can be learned from the lensed cosmic microwave background B-mode polarization power spectrum?
- Internal delensing of Cosmic Microwave Background polarization B-modes with the POLARBEAR experiment
- Transverse Velocities with the Moving Lens Effect
- Mitigating the optical depth degeneracy using the kinematic Sunyaev-Zel'dovich effect with CMB-S4
- Internal Delensing of Cosmic Microwave Background Acoustic Peaks
- Neutrino Mass from Cosmology: Probing Physics Beyond the Standard Model
- Systematic errors in the measurement of neutrino masses due to baryonic feedback processes: Prospects for stage IV lensing surveys
- Baryonic feedback biases on fundamental physics from lensed CMB power spectra
- Polarized Sunyaev Zel'dovich tomography
- Towards testing CMB anomalies using the kinetic and polarized Sunyaev Zel'dovich effects
- Cosmology with the moving lens effect
- Probing correlated compensated isocurvature perturbations using scale-dependent galaxy bias
- Cosmic Microwave Background Acoustic Peak Locations
- CMB internal delensing with general optimal estimator for higher-order correlations
- Reconstructing Small Scale Lenses from the Cosmic Microwave Background Temperature Fluctuations
- Lensing reconstruction from a patchwork of polarization maps
- Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
- Minimizing gravitational lensing contributions to the primordial bispectrum covariance
- Impact of internal-delensing biases on searches for primordial B-modes of CMB polarisation
- Improving Small-Scale CMB Lensing Reconstruction
- Beyond CMB cosmic variance limits on reionization with the polarized SZ effect
- Optimal filters for the moving lens effect
- Towards Neutrino Mass from Cosmology without Optical Depth Information
- How to detect gravitational waves through the cross-correlation of the galaxy distribution with the CMB polarization
- Baryonic effects on CMB lensing and neutrino mass constraints
- Non-Gaussian Covariance of CMB B-modes of Polarization and Parameter Degradation
- Avoiding baryonic feedback effects on neutrino mass measurements from CMB lensing
- Reconstructing large scales at cosmic dawn
- Reconstructing Patchy Reionization with Deep Learning
- Removing the ISW-lensing bias from the local-form primordial non-Gaussianity estimation
- KSZ tomography and the bispectrum
- Towards determining the neutrino mass hierarchy: weak lensing and galaxy clustering forecasts with baryons and intrinsic alignments
- Reconstructing Cosmic Polarization Rotation with ResUNet-CMB
- Primordial gravitational wave phenomenology with polarized Sunyaev Zel'dovich tomography
- The Physical Origin of Dark Energy Constraints from Rubin Observatory and CMB-S4 Lensing Tomography
- An Improved Forecast of Patchy Reionization Reconstruction with CMB
- CMB-HD: An Ultra-Deep, High-Resolution Millimeter-Wave Survey Over Half the Sky
- Constraining cosmic polarization rotation and implications for primordial B-modes
- Cosmological Implications of a Neutrino Mass Detection
Cited by in corpus (7)
- Line-Intensity Mapping: Theory Review
- Lensing power spectrum of the Cosmic Microwave Background with deep polarization experiments
- Cosmology from the kinetic polarized Sunyaev Zel'dovich effect
- Subtracting the kinetic Sunyaev-Zeldovich effect from the cosmic microwave background with surveys of large-scale structure
- Probing helium reionization with kinetic Sunyaev Zel'dovich tomography
- Cosmological probes of helium reionization
- Beyond Fisher Forecasting for Cosmology