Mitigating Foreground Bias to the CMB Lensing Power Spectrum for a CMB-HD Survey
arXiv:2112.02109 · doi:10.1103/PhysRevD.105.083516
Abstract
A promising way to measure the distribution of matter on small scales (k ~ 10 hMpc^-1) is to use gravitational lensing of the Cosmic Microwave Background (CMB). CMB-HD, a proposed high-resolution, low-noise millimeter survey over half the sky, can measure the CMB lensing auto spectrum on such small scales enabling measurements that can distinguish between a cold dark matter (CDM) model and alternative models designed to solve problems with CDM on small scales. However, extragalactic foregrounds can bias the CMB lensing auto spectrum if left untreated. We present a foreground mitigation strategy that provides a path to reduce the bias from two of the most dominant foregrounds, the thermal Sunyaev-Zel'dovich effect (tSZ) and the Cosmic Infrared Background (CIB). Given the level of realism included in our analysis, we find that the tSZ alone and the CIB alone bias the lensing auto spectrum by 0.6 sigma and 1.1 sigma respectively, in the lensing multipole range of L in [5000,20000] for a CMB-HD survey; combined these foregrounds yield a bias of only 1.3 sigma. Including these foregrounds, we also find that a CMB-HD survey can distinguish between a CDM model and a 10^-22 eV FDM model at the 5 sigma level. These results provide an important step in demonstrating that foreground contamination can be sufficiently reduced to enable a robust measurement of the small-scale matter power spectrum with CMB-HD.
arXiv comment14 pages, 6 figures; power spectra and lensing covariance matrix from this analysis are public at https://github.com/dwhan89/hdlensing
References in corpus (81)
- Efficient Computation of CMB anisotropies in closed FRW models
- LSST: from Science Drivers to Reference Design and Anticipated Data Products
- Dark Matter Substructure in Galactic Halos
- Where are the missing galactic satellites?
- Observational evidence for self-interacting cold dark matter
- Axion Cosmology
- Cold and Fuzzy Dark Matter
- Ultralight scalars as cosmological dark matter
- The Simons Observatory: Science goals and forecasts
- Small-Scale Challenges to the CDM Paradigm
- Too big to fail? The puzzling darkness of massive Milky Way subhaloes
- Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
- Halo Formation in Warm Dark Matter Models
- Dark Matter Self-interactions and Small Scale Structure
- Statistics of Cosmic Microwave Background Polarization
- Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
- Constraining Warm Dark Matter candidates including sterile neutrinos and light gravitinos with WMAP and the Lyman-alpha forest
- Observational and Theoretical Constraints on Singular Dark Matter Halos
- Planck 2018 results. VIII. Gravitational lensing
- Mass Reconstruction with CMB Polarization
- Subhaloes in Self-Interacting Galactic Dark Matter Haloes
- Dark Matter Halos as Particle Colliders: A Unified Solution to Small-Scale Structure Puzzles from Dwarfs to Clusters
- Cold dark matter: controversies on small scales
- Determination of Inflationary Observables by Cosmic Microwave Background Anisotropy Experiments
- The unexpected diversity of dwarf galaxy rotation curves
- The effects of galaxy formation on the matter power spectrum: A challenge for precision cosmology
- Weak Lensing of the CMB: A Harmonic Approach
- Late time Cosmological Phase Transition and Galactic Halo as Bose-liquid
- Substructure and halo density profiles in a Warm Dark Matter Cosmology
- Dark matter and cosmic structure
- Fluid Dark Matter
- Repulsive Dark Matter
- The Atacama Cosmology Telescope: Cosmological parameters from three seasons of data
- Core Formation in Dwarf Halos with Self Interacting Dark Matter: No Fine-Tuning Necessary
- How the Self-Interacting Dark Matter Model Explains the Diverse Galactic Rotation Curves
- Theory of Dark Matter Superfluidity
- Small scale problems of the CDM model: a short review
- A Baryonic Solution to the Missing Satellites Problem
- A measurement of secondary cosmic microwave background anisotropies from the 2500-square-degree SPT-SZ survey
- Simulations of the Microwave Sky
- Dark Matter from an ultra-light pseudo-Goldsone-boson
- Quantifying baryon effects on the matter power spectrum and the weak lensing shear correlation
- The Atacama Cosmology Telescope: likelihood for small-scale CMB data
- Lensing Reconstruction with CMB Temperature and Polarization
- Planck 2013 results. XVIII. Gravitational lensing-infrared background correlation
- The Atacama Cosmology Telescope: Combined kinematic and thermal Sunyaev-Zel'dovich measurements from BOSS CMASS and LOWZ halos
- New Light on Dark Matter
- Bias-Hardened CMB Lensing
- A Measurement of the Cosmic Microwave Background Gravitational Lensing Potential from 100 Square Degrees of SPTpol Data
- Evidence for the kinematic Sunyaev-Zeľdovich effect with ACTPol and velocity reconstruction from BOSS
- The Atacama Cosmology Telescope: Two-Season ACTPol Lensing Power Spectrum
- CMB Lensing Power Spectrum Biases from Galaxies and Clusters using High-angular Resolution Temperature Maps
- Extragalactic Foreground Contamination in Temperature-based CMB Lens Reconstruction
- Detection of Thermal SZ -- CMB Lensing Cross-Correlation in Planck Nominal Mission Data
- All about baryons: revisiting SIDM predictions at small halo masses
- The Atacama Cosmology Telescope: A CMB lensing mass map over 2100 square degrees of sky and its cross-correlation with BOSS-CMASS galaxies
- The Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect
- A Measurement of the Cosmic Microwave Background Lensing Potential and Power Spectrum from 500 deg of SPTpol Temperature and Polarization Data
- Mitigating Foreground Biases in CMB Lensing Reconstruction Using Cleaned Gradients
- Evidence of Lensing of the Cosmic Microwave Background by Dark Matter Halos
- Emulation of baryonic effects on the matter power spectrum and constraints from galaxy cluster data
- Foreground-immune CMB lensing with shear-only reconstruction
- Cluster Mass Estimators from CMB Temperature and Polarization Lensing
- DeepCMB: Lensing Reconstruction of the Cosmic Microwave Background with Deep Neural Networks
- Lower bias, lower noise CMB lensing with foreground-hardened estimators
- Bias to CMB Lensing Reconstruction from Temperature Anisotropies due to Large-Scale Galaxy Motions
- Signatures of Self-Interacting Dark Matter in the Matter Power Spectrum and the CMB
- Full-sky Cosmic Microwave Background Foreground Cleaning Using Machine Learning
- Constraining Cluster Virialization Mechanism and Cosmology using Thermal-SZ-selected clusters from Future CMB Surveys
- Gravitational Lensing of the Microwave Background by Galaxy Clusters
- Removing Astrophysics in 21 cm maps with Neural Networks
- Cluster Masses from CMB and Galaxy Weak Lensing
- Systematic errors in the measurement of neutrino masses due to baryonic feedback processes: Prospects for stage IV lensing surveys
- Measuring the Small-Scale Matter Power Spectrum with High-Resolution CMB Lensing
- Reconstructing Small Scale Lenses from the Cosmic Microwave Background Temperature Fluctuations
- Improving Small-Scale CMB Lensing Reconstruction
- MillimeterDL: Deep Learning Simulations of the Microwave Sky
- Re-Examining Astrophysical Constraints on the Dark Matter Model
- Reconstructing Patchy Reionization with Deep Learning
- DeepSZ: Identification of Sunyaev-Zel'dovich Galaxy Clusters using Deep Learning
- Reconstructing Cosmic Polarization Rotation with ResUNet-CMB
Cited by in corpus (7)
- The impact of extragalactic foregrounds on internal delensing of CMB B-mode polarization
- LiteBIRD Science Goals and Forecasts: A full-sky measurement of gravitational lensing of the CMB
- Subtracting the kinetic Sunyaev-Zeldovich effect from the cosmic microwave background with surveys of large-scale structure
- Unveiling Neutrino Halos with CMB Lensing
- kSZ Pairwise Velocity Reconstruction with Machine Learning
- Small Correlated Against Large Estimator (SCALE) for Cosmic Microwave Background Lensing
- Revisiting secondary CMB distortions due to kinetic Sunyaev-Zel'dovich effect from quasar bubbles before reionization