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The Structure and Dynamics of Cold Dark Matter Halos
Ben Moore, Sebastiano Ghigna, Fabio Governato +3
We investigate the internal structure of cold dark matter halos using high resolution N-body simulations. As the mass and force resolution are increased, halo density profiles beco…
Smooth Particle Hydrodynamics: Models, Applications, and Enabling Technologies
Piet Hut, Lars Hernquist, George Lake +3
We present the results from a two-day study in which we discussed various implementations of Smooth Particle Hydrodynamics (SPH), one of the leading methods used across a variety o…
On the origin of early type galaxies and the evolution of the interaction rate in the field
F. Governato, Jeffrey P. Gardner, J. Stadel +2
Using cosmological N-body simulations of critical (SCDM) and open (Omega_0=0.3, OCDM) cold dark matter models we have identified dark matter halos which are associated with the pro…
Time stepping N-body simulations
Thomas Quinn, Neal Katz, Joachim Stadel +1
Leapfrog integration has been the method of choice in N-body simulations owing to its low computational cost for a symplectic integrator with second order accuracy. We introduce a…
Resolving the Structure of Cold Dark Matter Halos
Ben Moore, Fabio Governato, Tom Quinn +2
We examine the effects of mass resolution and force softening on the density profiles of cold dark matter halos that form within cosmological N-body simulations. As we increase the…
The Formation of Quasars in Low Luminosity Hosts via Galaxy Harassment
George Lake, Neal Katz, Ben Moore
We have simulated disk galaxies undergoing continual bombardment by other galaxies in a rich cluster. "Galaxy harassment" leads to dramatic evolution of smaller disk galaxies and p…
Morphological Transformation from Galaxy Harassment
Ben Moore, George Lake, Neal Katz
Galaxy morphologies in clusters have undergone a remarkable transition over the past several billion years. Distant clusters at are filled with small spiral galaxies,…