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Non-linear Stochastic Galaxy Biasing in Cosmological Simulations
R. S. Somerville, G. Lemson, Y. Sigad +3
We study the biasing relation between dark-matter halos or galaxies and the underlying mass distribution, using cosmological -body simulations in which galaxies are modelled via…
Cosmic Flows 99: Conference Summary
Avishai Dekel
I address the following issues: All bulk velocity measurements (but one) are consistent with our standard gravitational instability theory. New accurate data and reconstruction met…
Cluster versus POTENT Density and Velocity Fields: Cluster Biasing and Omega
E. Branchini, I. Zehavi, M. Plionis +1
The density and velocity fields as extracted from the Abell/ACO clusters are compared to the corresponding fields recovered by the POTENT method from the Mark~III peculiar velociti…
Galaxy Interactions and Starbursts at High Redshift
R. S. Somerville, G. Rosenfeld, T. S. Kolatt +3
Using high resolution N-body simulations with hydrodynamics and star formation, we investigate interactions and the resulting starbursts in galaxies with properties typical of $z\s…
Cosmological Parameters and Power Spectrum from Peculiar Velocities
Idit Zehavi, Avishai Dekel
The power spectrum of mass density fluctuations is evaluated from the Mark III and the SFI catalogs of peculiar velocities by a maximum likelihood analysis, using parametric models…
Profiles of dark haloes: evolution, scatter, and environment
James S. Bullock, Tsafrir S. Kolatt, Yair Sigad +5
We study dark-matter halo density profiles in a high-resolution N-body simulation of an LCDM cosmology. Our statistical sample contains ~5000 haloes in the range 10^{11}-10^{14} M_…