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3 papers
Testing modified (Horndeski) gravity by combining intrinsic galaxyalignments with cosmic shear
Robert Reischke, Victor Bosca, Tim Tugendhat +1
We study the impact of modified gravity of the Horndeski class, on intrinsic shape correlations in cosmic shear surveys. As intrinsic shape correlations (IAs) are caused by tidal g…
Statistical separation of weak gravitational lensing and intrinsic ellipticities based on galaxy colour information
Tim M. Tugendhat, Robert Reischke, Bjoern Malte Schaefer
Intrinsic alignments of galaxies are recognised as one of the most important systematic in weak lensing surveys on small angular scales. In this paper we investigate ellipticity co…
Angular ellipticity correlations in a composite alignment model for elliptical and spiral galaxies and inference from weak lensing
Tim M. Tugendhat, Bjoern Malte Schaefer
We investigate a physical, composite alignment model for both spiral and elliptical galaxies and its impact on cosmological parameter estimation from weak lensing for a tomographic…