Reduced Shear Power Spectrum

Abstract

Measurements of ellipticities of background galaxies are sensitive to the reduced shear, the cosmic shear divided by $(1-\kappa )$ where $\kappa$ is the projected density field. We compute the difference between shear and reduced shear both analytically and with simulations. The difference becomes more important on smaller scales, and will impact cosmological parameter estimation from upcoming experiments. A simple recipe is presented to carry out the required correction.

8 pages, 5 figures

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• Self Calibration of Tomographic Weak Lensing for the Physics of Baryons to Constrain Dark Energy
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• Complete super-sample lensing covariance in the response approach
• A bias to CMB lensing measurements from the bispectrum of large-scale structure
• Lensing Bias in Cosmic Shear
• Accounting for Baryons in Cosmological Constraints from Cosmic Shear
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• Size Bias in Galaxy Surveys
• Dark Energy and Neutrino Masses from Future Measurements of the Expansion History and Growth of Structure
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• Effects of Unstable Dark Matter on Large-Scale Structure and Constraints from Future Surveys
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• On the Use of Fast Radio Burst Dispersion Measures as Distance Measures
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• Weak lensing and dark energy: the impact of dark energy on nonlinear dark matter clustering
• The Influence of Galaxy Formation Physics on Weak Lensing Tests of General Relativity
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• Primordial Non-Gaussianity and the Statistics of Weak Lensing and other Projected Density Fields
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• Diagnosing space telescope misalignment and jitter using stellar images
• The source-lens clustering effect in the context of lensing tomography and its self-calibration
• Constraining $f(R)$ Gravity with a $k$-cut Cosmic Shear Analysis of the Hyper Suprime-Cam First-Year Data
• Subpercent Accurate Fitting of Modified Gravity Growth
• Generating and Analyzing Constrained Dark Energy Equations of State and Systematics Functions
• Full-sky weak lensing: a nonlinear post-Friedmann treatment
• Power Spectrum Precision for Redshift Space Distortions
• Weak lensing corrections to tSZ-lensing cross correlation
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• Testing the Origin of the CMB Large-Angle Correlation Deficit with a Galaxy Imaging Survey
• On the absence of shear from perfect Einstein rings and the stability of geometry
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• Response approach to the integrated shear 3-point correlation function: the impact of baryonic effects on small scales
• Skew-spectra: a generalization to spin-$s$