Challenges in Cosmic Magnification Reconstruction by Magnification Response
arXiv:2409.01954 · doi:10.1103/PhysRevD.110.063551
Abstract
Cosmic magnification on the observed galaxy overdensity is a promising weak gravitational lensing tracer. Current cosmic magnification reconstruction algorithms, ABS (Analytical method of Blind Separation) and cILC (constrained Internal Linear Combination), intend to disentangle the weak lensing signal using the magnification response in various flux bins. In this work, we reveal an unrecognized systematic bias arising from the difference between galaxy bias and the galaxy-lensing cross-correlation bias, due to the mismatch between the weak lensing kernel and the redshift distribution of photometric objects. It results into a galaxy-lensing degeneracy, which invalidates ABS as an exact solution. Based on the simulated cosmoDC2 galaxies, we verify that the recovered weak lensing amplitude by ABS is biased low by . cILC, including a modified version proposed here, also suffers from systematic bias of comparable amplitude. Combining flux and color information leads to significant reduction in statistical errors, but fails to eliminate the aforementioned bias. With the presence of this newly found systematic, it remains a severe challenge in blindly and robustly separating the cosmic magnification from the galaxy intrinsic clustering.
8 pages and 4 figures in the main text. Accepted for publication in Physical Review D
References in corpus (69)
- Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
- LSST: from Science Drivers to Reference Design and Anticipated Data Products
- E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
- Weak Gravitational Lensing
- Simulating Galaxy Formation with the IllustrisTNG Model
- First results from the IllustrisTNG simulations: matter and galaxy clustering
- First results from the IllustrisTNG simulations: the stellar mass content of groups and clusters of galaxies
- First results from the IllustrisTNG simulations: the galaxy color bimodality
- First results from the IllustrisTNG simulations: A tale of two elements -- chemical evolution of magnesium and europium
- Simulating galaxy formation with black hole driven thermal and kinetic feedback
- Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
- First results from the IllustrisTNG simulations: radio haloes and magnetic fields
- Large-Scale Galaxy Bias
- Planck 2018 results. VIII. Gravitational lensing
- Mass Reconstruction with CMB Polarization
- A high resolution foreground cleaned CMB map from WMAP
- The linear power spectrum of observed source number counts
- Weak Gravitational Lensing and its Cosmological Applications
- A discriminating probe of gravity at cosmological scales
- Cosmology from the Chinese Space Station Optical Survey (CSS-OS)
- The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and its Implications for Structure Growth
- Detection of Cosmic Magnification with the Sloan Digital Sky Survey
- Hyper Suprime-Cam Year 3 Results: Cosmology from Cosmic Shear Power Spectra
- CMB and SZ effect separation with Constrained Internal Linear Combinations
- Measuring the galaxy-mass and galaxy-dust correlations through magnification and reddening
- Minimizing the stochasticity of halos in large-scale structure surveys
- KiDS-1000 catalogue: Weak gravitational lensing shear measurements
- How to suppress the shot noise in galaxy surveys
- CosmoDC2: A Synthetic Sky Catalog for Dark Energy Science with LSST
- IM3SHAPE: A maximum-likelihood galaxy shear measurement code for cosmic gravitational lensing
- The Outer Rim Simulation: A Path to Many-Core Supercomputers
- Testing photometric redshift measurements with filter definition of the Chinese Space Station Optical Survey (CSS-OS)
- A Detection of Weak Lensing Magnification using Galaxy Sizes and Magnitudes
- Peeling off foregrounds with the constrained moment ILC method to unveil primordial CMB -modes
- Quadratic estimators for CMB weak lensing
- The three dimensional power spectrum of dark and luminous matter from the VIRMOS-DESCART cosmic shear survey
- Mapping dark matter with cosmic magnification
- CMB anisotropy power spectrum using linear combinations of WMAP maps
- Improving the Accuracy of Cosmic Magnification Statistics
- CosmicGrowth Simulations---Cosmological simulations for structure growth studies
- Measuring Omega_0 with higher-order Quasar-Galaxy Correlations induced by Weak Lensing
- Dark Energy Survey Year 3 results: Magnification modeling and impact on cosmological constraints from galaxy clustering and galaxy-galaxy lensing
- The Richness-to-Mass Relation of CAMIRA Galaxy Clusters from Weak-lensing Magnification in the Subaru Hyper Suprime-Cam Survey
- Tomographic Magnification of Lyman Break Galaxies in The Deep Lens Survey
- Halo stochasticity in global clustering analysis
- Performance forecasts for the primordial gravitational wave detection pipelines for AliCPT-1
- Magnification Bias Corrections to Galaxy-Lensing Cross-Correlations
- Magnification Effects on Source Counts and Fluxes
- Forecast of Neutrino Cosmology from the CSST Photometric Galaxy Clustering and Cosmic Shear Surveys
- Magnification of Photometric LRGs by Foreground LRGs and Clusters in SDSS
- Measuring the Reduced Shear
- Weak lensing reconstruction through cosmic magnification I: a minimal variance map reconstruction
- Size magnification as a complement to Cosmic Shear
- On cosmological bias due to the magnification of shear and position samples in modern weak lensing analyses
- Cosmology with the sub-millimetre galaxies magnification bias: Tomographic Analysis
- The Mass-Richness Relation of MaxBCG Clusters from Quasar Lensing Magnification using Variability
- Magnification Bias Estimators for Realistic Surveys: an Application to the BOSS Survey
- DESI Legacy Imaging Surveys Data Release 9: Cosmological Constraints from Galaxy Clustering and Weak Lensing using the Minimal Bias Model
- Cluster mass profile reconstruction with size and flux magnification on the HST STAGES survey
- Weak lensing magnification of SpARCS galaxy clusters
- Constraining gravity with a new precision estimator using Planck + SDSS BOSS
- Weak lensing reconstruction through cosmic magnification. II. Improved power spectrum determination and map-making
- Weak lensing power spectrum reconstruction by counting galaxies.-- I: the ABS method
- Principal Component Analysis of Galaxy Clustering in Hyperspace of Galaxy Properties
- Weak lensing power spectrum reconstruction by counting galaxies.-- II: Improving the ABS method with the shift parameter
- Testing the ABS method with the simulated Planck temperature maps
- Quasi-stellar objects and galaxy mass density profiles derived using the submillimetre galaxies magnification bias
- A method of weak lensing reconstruction through cosmic magnification with multi-band photometry information
- Weak Lensing Magnification Reconstruction with the Modified Internal Linear Combination Method