150 citations · 1k across the 38 of their papers we have counts for
4 papers · 1 filter
A Comparison of Simulated and Analytic Major Merger Counts
J. D. Cohn, J. S. Bagla, Martin White
We use large volume, high resolution, N-body simulations of 3 different CDM models, with different clustering strengths, to generate dark matter halo merging histories. Over the…
Constraints on Galaxy Density Profiles from Strong Gravitational Lensing: The Case of B 1933+503
J. D. Cohn, C. S. Kochanek, B. A. McLeod +1
We consider a wide range of parametric mass models for B 1933+503, a ten-image radio lens, and identify shared properties of the models with the best fits. The approximate rotation…
Inflationary models with a flat potential enforced by non-abelian discrete gauge symmetries
E. D. Stewart, J. D. Cohn
Non-abelian discrete gauge symmetries can provide the inflaton with a flat potential even when one takes into account gravitational strength effects. The discreteness of the symmet…
Non-abelian discrete gauge symmetries and inflation
J. D. Cohn, E. D. Stewart
Obtaining a potential flat enough to provide slow roll inflation is often difficult when gravitational effects are included. Non-abelian discrete gauge symmetries can guarantee the…