8 papers
Weak Lensing Constraints on Cluster Structural Parameters
Jeffrey A. Willick, Nikhil Padmanabhan
We study the reliability of dark matter (DM) profile determinations for rich clusters of galaxies based on weak gravitational lensing measurements. We consider three functional for…
The Stanford Cluster Search for Distant Galaxy Clusters
Jeffrey A. Willick, Keith L. Thompson, Benjamin F. Mathiesen +3
We describe the scientific motivation behind, and the methodology of, the Stanford Cluster Search (StaCS), a program to compile a catalog of optically selected clusters of galaxies…
Cosmic Velocities 2000: A Review
Jeffrey A. Willick
I review the status of cosmic velocity analysis as of January 2000, with an emphasis on two key questions: (1) What is the scale of the largest bulk flows in the universe? and (2)…
First Results from the Shellflow Survey
S. Courteau, J. A. Willick, M. A. Strauss +2
We present preliminary results from the Shellflow program, an all-sky Tully-Fisher (TF) survey of 297 Sb-Sc with redshifts between 4000 and 7500 km/s. The program was designed to e…
The LCO/Palomar 10,000 km/sec Cluster Survey
Jeffrey A. Willick
I describe a Tully-Fisher (TF) survey of galaxies in 15 Abell Clusters distributed around the sky in the redshift range 9000-13,000 km/sec. The observations were done between 1992…
Panel Review: Reconstruction Methods and the Value of
Jeffrey A. Willick
The closely related issues of (1) reconstructing density and velocity fields from redshift survey and distance indicator data and (2) determining cosmological parameters from such…