Now showing items 1-10 of 39
Effects of mergers and core structure on the bulk properties of nearby galaxy clusters
(Univ Chicago Press, 2006-03-01)
We use X-ray morphological measurements and the scatter of clusters about observed and simulated scaling relations to examine the impact of merging and core-related phenomena on the structure of galaxy clusters. We use a ...
Clustering of dark matter halos on the light cone: Scale, time, and mass dependence of the halo biasing in the Hubble volume simulations
(Univ Chicago Press, 2001-11-10)
We develop a phenomenological model to predict the clustering of dark matter halos on the light cone by combining several existing theoretical models. Assuming that the velocity field of halos on large scales is approximated ...
Measuring the Mean and Scatter of the X-Ray Luminosity-Optical Richness Relation for maxBCG Galaxy Clusters
(Univ Chicago Press, 2007-03-01)
Determining the scaling relations between galaxy cluster observables requires large samples of uniformly observed clusters. We measure the mean X-ray luminosity-optical richness (L¯X-N¯200) relation for an approximately ...
Expectations for an interferometric Sunyaev-Zeldovich effect survey for galaxy clusters
(Univ Chicago Press, 2000-12-01)
We estimate the expected yield of a nontargeted survey for galaxy clusters using the Sunyaev-Zeldovich effect (SZE). Estimating survey yields requires a detailed model for both cluster properties and the survey strategy. ...
A cold front in a preheated galaxy cluster
(Univ Chicago Press, 2002-10-10)
We present a simulated cluster of galaxies, modeled with a preheated intracluster medium, that exhibits X-ray features similar to the cold fronts seen in Chandra observations. Mock observations at a particular epoch show ...
The X-ray size-temperature relation for intermediate-redshift galaxy clusters
(Univ Chicago Press, 2000-11-20)
We present the first measurements of the X-ray size-temperature (ST) relation in intermediate-redshift (z similar to 0.30) galaxy clusters. We interpret the local ST relation (z similar to 0.06) in terms of underlying ...
A multiphase model for the intracluster medium
(Blackwell Science Ltd, 2000-07-21)
Constraints on the clustered mass density Omega(m) of the Universe derived from the observed population mean intracluster gas fraction [f(ICM)] of X-ray clusters may be biased by reliance on a single-phase assumption for ...
Detecting intracluster gas motion in galaxy clusters: Mock Astro-E2 observations
(Univ Chicago Press, 2005-10-01)
We explore the detectability of bulk motions in the X-ray-emitting intracluster medium using a catalog of 1836 mock Astro-E2 observations of simulated clusters of galaxies. We generate high-resolution mock spectra for two ...
Cluster-supercluster alignments
(Univ Chicago Press, 2007-03-01)
We study correlations in spatial orientation between galaxy clusters and their host superclusters using a Hubble volume N-body realization of a concordance cosmology and an analytic model for tidally induced alignments. ...
The asymptotic form of cosmic structure: Small-scale power and accretion history
(Univ Chicago Press, 2007-08-10)
We explore the effects of small-scale structure on the formation and equilibrium of dark matter halos in a universe dominated by vacuum energy. We present the results of a suite of four N-body simulations, two with a Lambda ...