233 citations · 3.3k across the 110 of their papers we have counts for
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Investigating the Origins of Dark Matter Halo Density Profiles
Liliya L. R. Williams, Arif Babul, Julianne J. Dalcanton
Although high-resolution N-body simulations make robust empirical predictions for the density distribution within cold dark matter halos, these studies have yielded little physical…
Is B1422+231 a Golden Lens?
Somak Raychaudhury, Prasenjit Saha, Liliya L. R. Williams
B1422+231 is a quadruply-imaged QSO with an exceptionally large lensing contribution from group galaxies other than the main lensing galaxy. We detect diffuse X-rays from the galax…
Qualitative Theory for Lensed QSOs
Prasenjit Saha, Liliya L. R. Williams
We show that some characteristics of multiply-imaged QSO systems are very model-independent and can be deduced accurately by simply scrutinizing the relative positions of images an…
Determination of Reddening and Extinction Due to Dust in APM Galaxy Clusters
Joshua G. Nollenberg, Liliya L. R. Williams, Steve J. Maddox
Existing observations are consistent with rich clusters of galaxies having no dust on $\simgt$ Mpc scales, while galaxy groups most probably do have dust distributed over $\lesssim…