233 citations · 3.3k across the 110 of their papers we have counts for
6 papers · 1 filter
Cluster Mass Profile from Lensing
Hanadi M. AbdelSalam, Prasenjit Saha, Liliya L. R. Williams
We propose a new technique to reconstruct non-parametrically the projected mass distribution of galaxy clusters from their gravitational lens effect on background galaxies. The bea…
Undistorted Lensed Images in Galaxy Clusters
Liliya L. R. Williams, Geraint F. Lewis
To date, the study of high-magnification gravitational lensing effects of galaxy clusters has focused upon the grossly distorted, luminous arc-like features formed in massive, cent…
Image Separation vs. Redshift of Lensed QSOs: Implications for Galaxy Mass Profiles
Liliya L. R. Williams
Recently, Park and Gott reported an interesting observation: image separation of lensed QSOs declines with QSO redshift more precipitously than expected in any realistic world mode…
Measurement of the Hubble Constant Via Gravitational Lensing--- A Review of the Jodrell Bank ``Golden Lenses'' Workshop
Liliya L. R. Williams, Paul L. Schechter
Gravitational lensing is now widely and successfully used to study a range of astronomical phenomena, from individual objects, like galaxies and clusters, to the mass distribution…
Non-parametric reconstruction of the galaxy-lens in PG1115+080
Prasenjit Saha, Liliya L. R. Williams
We describe a new, non-parametric, method for reconstructing lensing mass distributions in multiple-image systems, and apply it to PG1115, for which time delays have recently been…
Non-parametric Reconstruction of Cluster Mass Distribution from Strong Lensing: Modelling Abell 370
H. M. AbdelSalam, P. Saha, L. L. R. Williams
We describe a new non-parametric technique for reconstructing the mass distribution in galaxy clusters with strong lensing, i.e., from multiple images of background galaxies. The o…