Now showing items 71-76 of 76
Red-sequence cluster finding in the millennium simulation
(Blackwell Publishing, 2007-12-21)
We investigate halo mass selection properties of red-sequence cluster finders using galaxy populations of the Millennium Simulation ( MS). A clear red sequence exists for MS galaxies in massive haloes at redshifts z < 1, ...
2-Fluid Simulations of Galaxy Formation
(Univ Chicago Press, 1994-02-10)
We investigate the formation of galaxies and larger structure with a simulation modeling two gravitationally coupled fluids representing dark matter and baryons. The baryon gas dynamics are calculated with a smoothed ...
Inflation without inflaton(s)
(IOP Publishing Ltd, 2007-11-01)
We propose a model for early universe cosmology without the need for fundamental scalar fields. Cosmic acceleration and phenomenologically viable reheating of the universe result from a series of energy transitions, where ...
The C4 clustering algorithm: clusters of galaxies in the Sloan Digital Sky Survey
(Univ Chicago Press, 2005-09)
We present the C4 Cluster Catalog, a new sample of 748 clusters of galaxies identified in the spectroscopic sample of the Second Data Release (DR2) of the Sloan Digital Sky Survey (SDSS). The C4 cluster-finding algorithm ...
The X-ray luminosity-mass relation for local clusters of galaxies
(Univ Chicago Press, 2006-09-10)
We investigate the relationship between soft X-ray luminosity and mass for low-redshift clusters of galaxies by comparing observed number counts and scaling laws to halo-based expectations of Lambda CDM cosmologies. We ...
Future evolution of cosmic structure in an accelerating universe
(Univ Chicago Press, 2003-10-20)
Current cosmological data indicate that our universe contains a substantial component of dark vacuum energy that is driving the cosmos to accelerate. We examine the immediate and longer term consequences of this dark energy ...