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Explore the impact of intrinsic galaxy alignments on weak gravitational lensing statistics through this 18-minute conference lecture from a cosmology workshop. Investigate how galaxy shape correlations affect non-Gaussian weak lensing field statistics using data from the IllustrisTNG hydrodynamical simulation. Learn about the creation and comparison of ray-traced convergence maps with and without intrinsic alignments, examining various statistical measures including shear-shear correlation functions, angular power spectra, one-point statistics, peak counts, minimum distribution functions, and Minkowski functionals. Discover the significant small-scale correlations in galaxy alignments and their effects on weak lensing convergence for both positive and negative high-significance features. Understand the critical importance of accounting for intrinsic alignments in next-generation weak lensing surveys to prevent biased cosmological parameter estimations and ensure accurate cosmological inferences when utilizing non-Gaussian statistics.
