233 citations · 3.3k across the 110 of their papers we have counts for
40 papers · 1 filter
The Role of the Radial Orbit Instability in Dark Matter Halo Formation and Structure
Jillian M. Bellovary, Julianne J. Dalcanton, Arif Babul +5
For a decade, N-body simulations have revealed a nearly universal dark matter density profile, which appears to be robust to changes in the overall density of the universe and the…
Lensed Image Angles: New Statistical Evidence for Substructure
Liliya L. R. Williams, Patrick Foley, Damon Farnsworth +1
We introduce a novel statistical way of analyzing the projected mass distribution in galaxy lenses based solely on the angular distribution of images in quads around the lens cente…
Mapping the distribution of luminous and dark matter in strong lensing galaxies
I. Ferreras, P. Saha, L. L. R. Williams +1
We present the distribution of luminous and dark matter in a set of strong lensing (early-type) galaxies. By combining two independent techniques - stellar population synthesis and…
Extragalactic Radio Sources and the WMAP Cold Spot
Lawrence Rudnick, Shea Brown, Liliya R. Williams
We detect a dip of 20-45% in the surface brightness and number counts of NVSS sources smoothed to a few degrees at the location of the WMAP cold spot. The dip has structure on scal…
Meso-structure in three strong-lensing systems
P. Saha, L. L. R. Williams, I. Ferreras
We map substructure in three strong lensing systems having particularly good image data: the galaxy lens MG J0414+053 and the clusters SDSS J1004+411 and ACO 1689. Our method is to…
Velocity Distributions from Nonextensive Thermodynamics
Eric I. Barnes, Liliya L. R. Williams, Arif Babul +1
There is no accepted mechanism that explains the equilibrium structures that form in collisionless cosmological N-body simulations. Recent work has identified nonextensive thermody…