Now showing items 1-4 of 4
Self-Calibration Technique for Three-Point Intrinsic Alignment Correlations in Weak Lensing Surveys
The intrinsic alignment (IA) of galaxies has been shown to be a significant barrier to precision cosmic shear measurements. Recently, Zhang proposed a self-calibration technique for the power spectrum to calculate the ...
Effect of Inhomogeneities on High Precision Measurements of Cosmological Distances
(American Physical Society, 2014-12-30)
We study effects of inhomogeneities on distance measures in an exact relativistic Swiss-cheese model of the Universe, focusing on the distance modulus. The model has ΛCDM background dynamics, and the "holes" are nonsymmetric ...
Self-Calibration for Three-Point Intrinsic Alignment Autocorrelations in Weak Lensing Surveys
The weak lensing signal (cosmic shear) has been shown to be strongly contaminated by the various types of galaxy intrinsic alignment (IA) correlations, which poses a barrier to precision weak lensing measurements. The ...
Self-Calibrating the Gravitational Shear-Intrinsic Ellipticity-Intrinsic Ellipticity Cross-Correlation
We extend the 3-point intrinsic alignment self-calibration technique to the gravitational shear-intrinsic ellipticity-intrinsic ellipticity (GII) bispectrum. While significantly decreased from using cross-correlations ...