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The Diversity and Similarity of Simulated Cold Dark Matter Halos
Julio F. Navarro, Aaron Ludlow, Volker Springel +6
We study the mass, velocity dispersion, and anisotropy profiles of CDM halos using a suite of N-body simulations of unprecedented numerical resolution (the {\it Aquarius Project…
The Aquarius Project: the subhalos of galactic halos
Volker Springel, Jie Wang, Mark Vogelsberger +6
We have performed the largest ever particle simulation of a Milky Way-sized dark matter halo, and present the most comprehensive convergence study for an individual dark matter hal…
The statistics of LCDM Halo Concentrations
Angelo F. Neto, Liang Gao, Philip Bett +6
We use the Millennium Simulation (MS) to study the statistics of LCDM halo concentrations at z = 0. Our results confirm that the average halo concentration declines monotonically w…
The Hierarchical Formation of the Galactic Disk
Julio F. Navarro
I review the results of recent cosmological simulations of galaxy formation that highlight the importance of satellite accretion in the formation of galactic disks. Tidal debris of…
The Structural Evolution of Substructure
Eric Hayashi, Julio F. Navarro, James E. Taylor +2
We investigate the evolution of substructure in cold dark matter halos using N-body simulations of tidal stripping of substructure halos (subhalos) within a static host potential.…
The Hierarchical Origin of Galaxy Morphologies
M. Steinmetz, Julio F. Navarro
We report first results from a series of N-body/gasdynamical simulations designed to study the origin of galaxy morphologies in a cold dark matter-dominated universe. The simulatio…
The Inner Structure of LambdaCDM Halos I: A Numerical Convergence Study
C. Power, J. F. Navarro, A. Jenkins +5
We present a comprehensive set of convergence tests which explore the role of various numerical parameters on the equilibrium structure of a simulated dark matter halo. We report r…
Substructure in CDM Halos and the Heating of Stellar Disks
Julio F. Navarro
Numerical simulations have revealed the presence of long-lived substructure in Cold Dark Matter (CDM) halos. These surviving cores of past merger and accretion events vastly outnum…
Halo Substructure and Disk Heating in a Lambda CDM Universe
Andreea S. Font, Julio F. Navarro, Joachim Stadel +1
We examine recent suggestions that substructure in cold dark matter (CDM) halos may be in conflict with the presence of thin, dynamically fragile stellar disks. N-body simulations…
The Phase-Space Density Profiles of Cold Dark Matter Halos
James E. Taylor, Julio F. Navarro
We examine the coarse-grained phase-space density profiles of a set of recent, high-resolution simulations of galaxy-sized Cold Dark Matter (CDM) halos. Over two and a half decades…
The Power Spectrum Dependence of Dark Matter Halo Concentrations
V. R. Eke, J. F. Navarro, M. Steinmetz
High-resolution N-body simulations are used to examine the power spectrum dependence of the concentration of galaxy-sized dark matter halos. It is found that dark halo concentratio…
The Origin of Star Formation Gradients in Rich Galaxy Clusters
Michael L. Balogh, Julio F. Navarro, Simon L. Morris
We examine the origin of clustercentric gradients in the star formation rates and colors of rich cluster galaxies within the context of a simple model where clusters are built thro…
Dark Halo and Disk Galaxy Scaling Laws in Hierarchical Universes
Julio F. Navarro, Matthias Steinmetz
We use cosmological N-body/gasdynamical simulations that include star formation and feedback to examine the proposal that scaling laws between the total luminosity, rotation speed,…
The core density of dark matter halos: a critical challenge to the Lambda-CDM paradigm?
Julio F. Navarro, Matthias Steinmetz
We compare the central mass concentration of Cold Dark Matter halos found in cosmological N-body simulations with constraints derived from the Milky Way disk dynamics and from the…
The Santa Barbara cluster comparison project: a comparison of cosmological hydrodynamics solutions
C. S. Frenk, S. D. M. White, P. Bode +22
We have simulated the formation of an X-ray cluster in a cold dark matter universe using 12 different codes. The codes span the range of numerical techniques and implementations cu…
The Core Structure of Galaxy Clusters from Gravitational Lensing
Liliya L. R. Williams, Julio F. Navarro, Matthias Bartelmann
We examine gravitational lensing constraints on the structure of galaxy clusters and compare them with the results of cosmological N-body simulations of cluster formation in cold d…
The Imprint of Galaxy Formation on X-ray Clusters
T. J. Ponman, D. B. Cannon, J. F. Navarro
It is widely believed that structure in the Universe evolves hierarchically, as primordial density fluctuations, amplified by gravity, collapse and merge to form progressively larg…
The cosmological origin of the Tully-Fisher relation
Matthias Steinmetz, Julio Navarro
We use high-resolution cosmological simulations that include the effects of gasdynamics and star formation to investigate the origin of the Tully-Fisher relation in the standard Co…
The Evolution of X-ray Clusters in Low Density Universes
Vincent R. Eke, Julio F. Navarro, Carlos S. Frenk
We present results of N-body/gasdynamical simulations designed to investigate the evolution of X-ray clusters in a flat, low-density, cold dark matter (CDM) cosmogony. The density…
A Universal Density Profile from Hierarchical Clustering
Julio F. Navarro, Carlos S. Frenk, Simon D. M. White
We use high-resolution N-body simulations to study the equilibrium density profiles of dark matter halos in hierarchically clustering universes. We find that all such profiles have…
Cosmological Constraints from Rotation Curves of Disk Galaxies
Julio F. Navarro
High-resolution N--body simulations show a remarkable similarity in the structure of dark matter halos formed through dissipationless hierarchical clustering. Independent of halo m…
The Effects of a Photoionizing UV Background on the Formation of Disk Galaxies
Julio Navarro, Matthias Steinmetz
We use high resolution N-body/gasdynamical simulations to investigate the effects of a photoionizing UV background on the assembly of disk galaxies in hierarchically clustering uni…
Cluster correlation functions in N-body simulations
Vincent R. Eke, Shaun Cole, Carlos S. Frenk +1
The correlation function of galaxy clusters has often been used as a test of cosmological models. A number of assumptions are implicit in the comparison of theoretical expectations…
Mass Estimates of X-Ray Clusters
August E. Evrard, Christopher A. Metzler, Julio F. Navarro
We use cosmological gas dynamic simulations to investigate the accuracy of galaxy cluster mass estimates based on X-ray observations. The experiments follow the formation of cluste…