233 citations · 3.3k across the 110 of their papers we have counts for
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Pixelated Lenses and H_0 from Time-delay QSOs
Liliya L. R. Williams, Prasenjit Saha
Observed time delays between images of a lensed QSO lead to the determination of the Hubble constant by Refsdal's method, provided the mass distribution in the lensing galaxy is re…
Cluster Reconstruction from Combined Strong and Weak Lensing
Prasenjit Saha, Liliya L. R. Williams, Hanadi AbdelSalam
The lensing information provided by multiple images, arclets, and statistical distortions can all be formulated as linear constraints on the arrival-time surface, and hence on the…
Pixellated Lenses and Estimates of H_0 from Time-delay Quasars
Liliya L. R. Williams, Prasenjit Saha
The largest source of uncertainty in the determination of H_0 from a multiply-imaged QSO system is the unknown mass distribution in the lensing galaxy. Parametric models severely r…
Weak Lensing Induced Correlations Between 1 Jy QSOs and APM Galaxies on Angular Scales of a Degree
Dara J. Norman, Liliya L. R. Williams
We find angular correlations between high redshift radio selected QSOs from the 1 Jy Catalog and APM galaxies on ~1 degree scales. We demonstrate that observed correlations are qua…
Large-Scale QSO-Galaxy Correlations and Weak Lensing
Liliya L. R. Williams
Several recent studies show that bright, intermediate and high redshift optically and radio selected QSOs are positively correlated with nearby galaxies on a range of angular scale…
The Core Structure of Galaxy Clusters from Gravitational Lensing
Liliya L. R. Williams, Julio F. Navarro, Matthias Bartelmann
We examine gravitational lensing constraints on the structure of galaxy clusters and compare them with the results of cosmological N-body simulations of cluster formation in cold d…