2.3k citations · 4.5k across the 31 of their papers we have counts for
31 papers
A Survey for Large Separation Lensed FIRST Quasars, II. Magnification Bias and Redshift Distribution
Eran O. Ofek, Hans-Walter Rix, Dan Maoz +1
The statistics of large-separation gravitational lensing are a powerful tool to probe mass distributions on the scale of galaxy clusters. In this paper we refine the analysis of ou…
A Survey for Large Separation Lensed FIRST Quasars
E. O. Ofek, D. Maoz, F. Prada +2
Little is known about the statistics of gravitationally lensed quasars at large (7''-30'') image separations, which probe masses on the scale of galaxy clusters. We have carried ou…
Lensing by Lyman Limit Systems: Determining the Mass to Gas Ratio
Ariyeh Maller, Tsafrir Kolatt, Matthias Bartelmann +1
We present a new method to determine the total mass-to-neutral gas ratio in Lyman-limits systems. The method exploits the relation between the neutral hydrogen column density and t…
A universal angular momentum profile for galactic halos
James S. Bullock, Avishai Dekel, Tsafrir S. Kolatt +4
[Abridged] We study the angular-momentum profiles of a statistical sample of halos drawn from a high-resolution N-body simulation of the LCDM cosmology. We find that the cumulative…
Spin Profile of Galactic Halos and Disk Formation
A. Dekel, J. S. Bullock, C. Porciani +4
We summarize recent developments in the study of the origin of halo spin profiles and preliminary implications on disk formation. The specific angular-momentum distributions within…
Origin and Destiny of Dark Matter Halos: Cosmological Matter Exchange and Metal Enrichment
Tsafrir S. Kolatt, James S. Bullock, Avishai Dekel +4
[Abridged] We analyze the exchange of dark matter between halos, subhalos, and their environments in a high-resolution cosmological N-body simulation of a Lambda CDM cosmology. At…