Effect of dust in circumgalactic haloes on the cosmic shear power spectrum

Abstract

Weak gravitational lensing is a powerful statistical tool for probing the growth of cosmic structure and measuring cosmological parameters. However, as shown by studies such as Ménard et al. (2010), dust in the circumgalactic region of haloes dims and reddens background sources. In a weak lensing analysis, this selects against sources behind overdense regions; since there is more structure in overdense regions, we will underestimate the amplitude of density perturbations ${\sigma }_8$ if we do not correct for the effects of circumgalactic dust. To model the dust distribution we employ the halo model. Assuming a fiducial dust mass profile based on measurements from Ménard et al. (2010), we compute the ratio $Z$ of the systematic error to the statistical error for a survey similar to the Nancy Grace Roman Space Telescope reference survey (2000 deg${}^2$ area, single-filter effective source density 30 galaxies arcmin${}^{-2}$). For a waveband centered at $1580$ nm ($H$-band), we find that $Z_H=0.37$. For a similar survey with waveband centered at $620$ nm ($r$-band), we also computed $Z_r=2.8$. Within our fiducial dust model, since $Z_r>1$, the systematic effect of dust will be significant on weak lensing image surveys. We also computed the dust bias on the amplitude of the power spectrum, ${\sigma }_8$, and found it to be for each waveband $\Delta {\sigma }_8/{\sigma }_8=-3.1\times 10^{-4}$ ($H$ band) or $-2.2\times 10^{-3}$ ($r$ band) if all other parameters are held fixed (the forecast Roman statistical-only error $\sigma ({\sigma }_8)/{\sigma }_8$ is $9\times 10^{-4}$).

arXiv comment17 pages, 8 figures

References in corpus (57)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Large scale bias and the peak background split
• Dust Grain Size Distributions and Extinction in the Milky Way, LMC, and SMC
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• The Average Star Formation Histories of Galaxies in Dark Matter Halos from z=0-8
• Observational Probes of Cosmic Acceleration
• Analytic model for galaxy and dark matter clustering
• Galaxy halo masses and satellite fractions from galaxy-galaxy lensing in the SDSS: stellar mass, luminosity, morphology, and environment dependencies
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Cosmic Shear
• CFHTLenS tomographic weak lensing cosmological parameter constraints: Mitigating the impact of intrinsic galaxy alignments
• Detection of weak gravitational lensing distortions of distant galaxies by cosmic dark matter at large scales
• Detection of Weak Gravitational Lensing by Large-scale Structure
• Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data
• Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Data Calibration
• The Sunyaev-Zel'dovich angular power spectrum as a probe of cosmological parameters
• An accurate halo model for fitting non-linear cosmological power spectra and baryonic feedback models
• A new measure for cosmic shear
• Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Modeling Uncertainty
• Weak lensing for precision cosmology
• Dark Energy Survey Year 1 Results: Constraints on Extended Cosmological Models from Galaxy Clustering and Weak Lensing
• KiDS+VIKING-450: Cosmic shear tomography with optical+infrared data
• CFHTLenS: Combined probe cosmological model comparison using 2D weak gravitational lensing
• Cosmological constraints from cosmic shear two-point correlation functions with HSC survey first-year data
• Detection of Cosmic Magnification with the Sloan Digital Sky Survey
• Dark Synergy: Gravitational Lensing and the CMB
• Sunyaev - Zel'dovich fluctuations from spatial correlations between clusters of galaxies
• The Three-Point Correlation Function in Cosmology
• Origins of weak lensing systematics, and requirements on future instrumentation (or knowledge of instrumentation)
• Measuring the galaxy-mass and galaxy-dust correlations through magnification and reddening
• Systematic Bias in Cosmic Shear: Beyond the Fisher Matrix
• The Wide Field Infrared Survey Telescope: 100 Hubbles for the 2020s
• Dust Formation in Milky Way-like Galaxies
• Effects of Systematic Uncertainties on the Supernova Determination of Cosmological Parameters
• KiDS+VIKING-450 and DES-Y1 combined: Mitigating baryon feedback uncertainty with COSEBIs
• Modern yields per stellar generation: the effect of the IMF
• Second Order Corrections to Weak Lensing by Large-Scale Structure
• Cosmology with the Wide-Field Infrared Survey Telescope -- Multi-Probe Strategies
• Weak lensing power spectra for precision cosmology: Multiple-deflection, reduced shear and lensing bias corrections
• Detection of Cosmic Shear with the HST Survey Strip
• The LSST Dark Energy Science Collaboration (DESC) Science Requirements Document
• SCARLET: Source separation in multi-band images by Constrained Matrix Factorization
• Weak Gravitational Lensing Bispectrum
• Lensing Bias in Cosmic Shear
• Biased Dark Energy Constraints from Neglecting Reduced Shear in Weak Lensing Surveys
• Size Bias in Galaxy Surveys
• The Ellipticity Distribution of Ambiguously Blended Objects
• Cosmology with the Wide-Field Infrared Survey Telescope -- Synergies with the Rubin Observatory Legacy Survey of Space and Time
• The stellar mass versus stellar metallicity relation of star-forming galaxies at $1.6\le z\le 3.0$ and implications for the evolution of the $\alpha$-enhancement
• Solar Elemental Abundances
• A Synthetic Roman Space Telescope High-Latitude Imaging Survey: Simulation Suite and the Impact of Wavefront Errors on Weak Gravitational Lensing
• Euclid: The reduced shear approximation and magnification bias for Stage IV cosmic shear experiments
• Background sky obscuration by cluster galaxies as a source of systematic error for weak lensing
• Testing gravity on cosmological scales with cosmic shear, cosmic microwave background anisotropies, and redshift-space distortions
• Intergalactic Dust Extinction in Hydrodynamic Cosmological Simulations
• Are optically-selected QSO catalogs biased ?
• Blending and obscuration in weak lensing magnification