Now showing items 11-20 of 45
A Comparison of Cosmological Hydrodynamic Codes
(Univ Chicago Press, 1994-07-20)
We present a detailed comparison of the simulation results of various cosmological hydrodynamic codes. Starting with identical initial conditions based on the cold dark matter scenario for the growth of structure, with ...
Optical Signatures of High-Redshift Galaxy Clusters
(Univ Chicago Press, 1994-03-20)
We combine an N-body and gasdynamic simulation of structure formation with an updated population synthesis code to explore the expected optical characteristics of a high-redshift cluster of galaxies. We examine a poor (2 ...
Characterization and radiation testing of the Harris HS9008RH flash analogue to digital converter
(Elsevier, 1994-06-15)
Results from tests characterizing the performance and radiation hardness of the HS9008RH flash analog to digital convertor (FADC) are presented. These tests were performed primarily to evaluate the suitability of this ...
String fluid dynamics in general relativity
(IOP Publishing Ltd, 1997-08-01)
The general, energy - momentum tensor for a dynamical, string fluid in general relativity is presented using the Ray - Hilbert variational principle. The calculations are given for both the standard and the extended ...
CAMAC modules for recording arbitrarily long time series
(Elsevier, 1992-08-15)
Two CAMAC modules have been designed to record the time of arrival of up to 32768 sequential events. the system consists of a clock module to generate a gated clock pulse train and a memory module to record event arrival ...
Cosmological Constraints from Observed Cluster X-Ray Morphologies
(Univ Chicago Press, 1995-07-01)
We use a representative sample of 65 galaxy dusters observed with the Einstein IPC to constrain the range of cluster X-ray morphologies. We develop and apply quantitative and reproducible measures of cluster X-ray morphologies ...
Constraints on Omega(0) and cluster evolution using the ROSAT logN-logS relation
(Blackwell Science Ltd, 1998-04-21)
We examine the Likelihoods of different cosmological models and cluster evolutionary histories by comparing semi-analytical predictions of X-ray cluster number counts with observational data from the ROSAT satellite. We ...
A Simulation of the Intracluster Medium With Feedback from Cluster Galaxies
(Univ Chicago Press, 1994-12-20)
We detail method and report first results from a three-dimensional hydrodynamical and N-body simulation of the formation and evolution of a Coma-sized cluster of galaxies, with the intent of studying the history of the ...
The Cosmological Dependence of Cluster Density Profiles
(Univ Chicago Press, 1994-10-20)
We use N-body simulations to study the shape of mean cluster density and velocity profiles in the nonlinear regime formed via gravitational instability. The dependence of the final structure on both cosmology and initial ...