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The impact of mass map truncation on strong lensing simulations
Lyne Van de Vyvere, Dominique Sluse, Sampath Mukherjee +2
Strong gravitational lensing is a powerful tool to measure cosmological parameters and to study galaxy evolution mechanisms. However, quantitative strong lensing studies often requ…
Time Delay Lens Modelling Challenge
X. Ding, T. Treu, S. Birrer +26
In recent years, breakthroughs in methods and data have enabled gravitational time delays to emerge as a very powerful tool to measure the Hubble constant . However, published…
Time Delay Lens Modeling Challenge: I. Experimental Design
Xuheng Ding, Tommaso Treu, Anowar J. Shajib +11
Strong gravitational lenses with measured time delay are a powerful tool to measure cosmological parameters, especially the Hubble constant (). Recent studies show that by com…
Intrinsic Alignments of Galaxies in the Illustris Simulation
Stefan Hilbert, Dandan Xu, Peter Schneider +3
We study intrinsic alignments (IA) of galaxy image shapes within the Illustris cosmic structure formation simulations. We investigate how IA correlations depend on observable galax…
The Illustris Simulation: Public Data Release
Dylan Nelson, Annalisa Pillepich, Shy Genel +12
We present the full public release of all data from the Illustris simulation project. Illustris is a suite of large volume, cosmological hydrodynamical simulations run with the mov…
How well can cold-dark-matter substructures account for the observed radio flux-ratio anomalies?
Dandan Xu, Dominique Sluse, Liang Gao +5
Discrepancies between the observed and model-predicted radio flux ratios are seen in a number of quadruply-lensed quasars. The most favored interpretation of these anomalies is tha…
Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
Mark Vogelsberger, Shy Genel, Volker Springel +6
We introduce the Illustris Project, a series of large-scale hydrodynamical simulations of galaxy formation. The highest resolution simulation, Illustris-1, covers a volume of $(106…
How well can cold-dark-matter substructures account for the observed lensing flux-ratio anomalies?
D. D. Xu, Dominique Sluse, Liang Gao +4
Lensing flux-ratio anomalies are most likely caused by gravitational lensing by small-scale dark matter structures. These anomalies offer the prospect of testing a fundamental pred…
On the Effects of Line-of-Sight Structures on Lensing Flux-ratio Anomalies in a LCDM Universe
D. D. Xu, Shude Mao, Andrew Cooper +4
The flux-ratio anomalies observed in multiply-lensed quasar images are most plausibly explained as the result of perturbing structures superposed on the underlying smooth matter di…
Estimate of halo ellipticity as a function of radius with flexions
Xinzhong Er, Shude Mao, Dandan Xu +1
The cold dark matter theory predicts triaxial dark matter haloes. The radial distribution of halo ellipticity depends on baryonic processes and the nature of dark matter particles…
Substructure Lensing: Effects of Galaxies, Globular Clusters & Satellite Streams
D. D. Xu, S. Mao, A. Cooper +4
Lensing flux-ratio anomalies have been frequently observed and taken as evidence for the presence of abundant dark matter substructures in lensing galaxies, as predicted by the col…