The structure and evolution of cold dark matter halos (2009)
In the standard cosmological model a mysterious cold dark matter (CDM) component dominates the formation of structures. Numerical studies of the formation of CDM halos have produced several robust...
Mastropietro, Chiara, Burkert, Andreas, Moore, Ben
We use high resolution N-body/SPH simulations to study the hydrodynamical interaction between the Large Magellanic Cloud (LMC) and the hot halo of the Milky Way. We investigate whether ram-pressure...
Shaya, Edward, Olling, Robert, Ricotti, Massimo, Vogel, Stuart, Majewski, Steven R., Patterson, Richard J., ...
The fact that dark matter (DM), thus far, has revealed itself only on scales of galaxies and larger, again thrusts onto astrophysics the opportunity and the responsibility to confront the age old...
Galactic Dynamics and Local Dark Matter (2009)
Majewski, Steven R., Bullock, James, Burkert, Andreas, Gibson, Brad, Grebel, Eva, Gnedin, Oleg Y., ...
The concordance Lambda Cold Dark Matter (Lambda-CDM) model for the formation of structure in the Universe, while remarkably successful at describing observations of structure on large scales,...
Disk formation and the origin of clumpy galaxies at high redshift (2009)
Agertz, Oscar, Teyssier, Romain, Moore, Ben
Observations of high redshift galaxies have revealed a multitude of large clumpy rapidly star-forming galaxies. Their formation scenario and their link to present day spirals is still unknown. In...
The Graininess of Dark Matter Haloes (2008)
Zemp, Marcel, Diemand, Jürg, Kuhlen, Michael, Madau, Piero, Moore, Ben, Potter, Doug, ...
We use the recently completed one billion particle Via Lactea II LambdaCDM simulation to investigate local properties like density, mean velocity, velocity dispersion, anisotropy, orientation and...
Central mass and luminosity of Milky Way satellites in the LCDM model (2008)
Maccio', Andrea V., Kang, Xi, Moore, Ben
It has been pointed out that the Galactic satellites all have a common mass around 1e7 Msun within 300 pc (M03), while they span almost four order of magnitudes in luminosity (Mateo et al. 1993,...
Large scale galactic turbulence: can self-gravity drive the observed HI velocity dispersions? (2008)
Agertz, Oscar, Lake, George, Teyssier, Romain, Moore, Ben, Mayer, Lucio, Romeo, Alessandro B.
Observations of turbulent velocity dispersions in the HI component of galactic disks show a characteristic floor in galaxies with low star formation rates and within individual galaxies the...
Stadel, Joachim, Potter, Doug, Moore, Ben, Diemand, Jürg, Madau, Piero, Zemp, Marcel, ...
We perform a series of simulations of a Galactic mass dark matter halo at different resolutions, our largest uses over three billion particles and has a mass resolution of 1000 M_sun. We quantify the...
Goerdt, Tobias, Read, J. I., Moore, Ben, Stadel, Joachim
Massive objects sinking within galaxies or dark matter haloes via dynamical friction will exchange momentum with central particles, ejecting them from the cusp and reducing the density of the inner...
Morishima, Ryuji, Schmidt, Max W., Stadel, Joachim, Moore, Ben
Remnant planetesimals might have played an important role in reducing the orbital eccentricities of the terrestrial planets after their formation via giant impacts. However, the population and the...
Romeo, Alessandro B., Agertz, Oscar, Moore, Ben, Stadel, Joachim
Melott has made pioneering studies of the effects of particle discreteness in N-body simulations, a fundamental point that needs careful thought and analysis since all such simulations suffer from...
Discreteness Effects in Lambda Cold Dark Matter Simulations: A Wavelet-Statistical View (2008)
Romeo, Alessandro B., Agertz, Oscar, Moore, Ben, Stadel, Joachim
The effects of particle discreteness in N-body simulations of Lambda Cold Dark Matter (LambdaCDM) are still an intensively debated issue. In this paper we explore such effects, taking into account...
The formation of ultra-compact dwarf galaxies and nucleated dwarf galaxies (2008)
Goerdt, Tobias, Moore, Ben, Kazantzidis, Stelios, Kaufmann, Tobias, Macciò, Andrea V., Stadel, Joachim
Ultra-compact dwarf galaxies (UCDs) have similar properties as massive globular clusters or the nuclei of nucleated galaxies. Recent observations suggesting a high dark matter content and a steep...
The formation of ultra-compact dwarf galaxies and nucleated dwarf galaxies (2007)
Goerdt, Tobias, Moore, Ben, Kazantzidis, Stelios, Kaufmann, Tobias, Macciò, Andrea V., Stadel, Joachim
Ultra compact dwarf galaxies (UCDs) have similar properties as massive globular clusters or the nuclei of nucleated galaxies. Recent observations suggesting a high dark matter content and a steep...
Multimass spherical structure models for N-body simulations (2007)
Zemp, Marcel, Moore, Ben, Stadel, Joachim, Carollo, C. Marcella, Madau, Piero
We present a simple and efficient method to set up spherical structure models for N-body simulations with a multimass technique. This technique reduces by a substantial factor the computer run time...
The Causes of Halo Shape Changes Induced by Cooling Baryons: Disks Versus Substructures (2007)
Debattista, Victor P., Moore, Ben, Quinn, Thomas, Kazantzidis, Stelios, Maas, Ryan, Mayer, Lucio, ...
Cold dark matter cosmogony predicts triaxial dark matter halos, whereas observations find quite round halos. This is most likely due to the condensation of baryons leading to rounder halos. We...
Weinmann, Simone M., Maccio', Andrea V., Iliev, Ilian T., Mellema, Garrelt, Moore, Ben
The reionization of the Universe has profound effects on the way galaxies form and on their observed properties at later times. Of particular importance is the relative timing of the reionization...
Influence of Orbital Behaviour and Chaos on the Shape of Dark Matter Halos (2007)
Maccio', Andrea V., Sideris, Ioannis, Miranda, Marco, Moore, Ben, Jesseit, Roland
It has been shown that the dissipative gas infall during galaxy formation has the capability to modify the shape of dark matter halos. In this paper we perform the first detailed analysis of particle...
Fundamental differences between SPH and grid methods (2007)
Agertz, Oscar, Moore, Ben, Stadel, Joachim, Potter, Doug, Miniati, Francesco, Read, Justin, ...
Macciò, Andrea V., Dutton, Aaron A., Van Den Bosch, Frank C., Moore, Ben, Potter, Doug, Stadel, Joachim
We use a series of cosmological N-body simulations for a flat Lambda cold dark matter (LambdaCDM) cosmology to investigate the structural properties of dark matter haloes, at redshift zero, in the...
Merritt, David, Graham, Alister, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Also archived in: arXiv:astro-ph/0509417 v2 Aug 29 2006
Fundamental differences between SPH and grid methods (2006)
Agertz, Oscar, Moore, Ben, Stadel, Joachim, Potter, Doug, Miniati, Francesco, Read, Justin, ...
We have carried out a hydrodynamical code comparison study of interacting multiphase fluids. The two commonly used techniques of grid and smoothed particle hydrodynamics (SPH) show striking...
Dark Satellites and Cosmic Reionization (2006)
Maccio', Andrea V., Moore, Ben, Stadel, Joachim, Potter, Doug
A possible explanation of the present discrepancy between the abundance of galactic subhaloes predicted by N-Body simulations with those observed in the Local Group is presented. We study the impact...
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Juerg, Terzic, Balsa
We have recently shown that both the Prugniel-Simien model and Sersic's function (hereafter referred to as the Einasto model when applied to internal density profiles) describe simulated dark matter...
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Juerg, Terzic, Balsa
We have recently shown that the 3-parameter density-profile model from Prugniel & Simien provides a better fit to simulated, galaxy- and cluster-sized, dark matter halos than an NFW-like model with...
Goerdt, Tobias, Gnedin, Oleg Y., Moore, Ben, Diemand, Jürg, Stadel, Joachim
If the dark matter particle is a neutralino then the first structures to form are cuspy cold dark matter (CDM) haloes collapsing after redshifts z ~ 100 in the mass range 10^{-6} - 10^{-3} Msun. We...
Maccio', Andrea V., Dutton, Aaron A., Moore, Ben, Potter, Doug, Stadel, Joachim
We use a series of cosmological N-body simulations for a flat LCDM cosmology to investigate the properties of dark matter haloes in the mass range 3.0e9-3.0e13 Msun. These properties include the...
Dynamical friction in constant density cores: a failure of the Chandrasekhar formula (2006)
Read, J. I., Goerdt, Tobias, Moore, Ben, Pontzen, A. P., Stadel, Joachim, Lake, George
Using analytic calculations and N-body simulations we show that in constant density (harmonic) cores, sinking satellites undergo an initial phase of very rapid (super-Chandrasekhar) dynamical...
An optimum time-stepping scheme for N-body simulations (2006)
Zemp, Marcel, Stadel, Joachim, Moore, Ben, Carollo, C. Marcella
We present a new time-stepping criterion for N-body simulations that is based on the true dynamical time of a particle. This allows us to follow the orbits of particles correctly in all environments...
Properties of Galaxy Groups in the SDSS: II.- AGN Feedback and Star Formation Truncation (2006)
Weinmann, Simone M., Yang, Xiaohu, Mo, H. J., Croton, Darren J., Moore, Ben
Successfully reproducing the galaxy luminosity function and the bimodality in the galaxy distribution requires a mechanism that can truncate star formation in massive haloes. Current models of galaxy...
Hansen, Steen H., Agertz, Oscar, Joyce, Michael, Stadel, Joachim, Moore, Ben, Potter, Doug
N-body simulations sample their initial conditions on an initial particle distribution, which for cosmological simulations is usually a glass or grid, whilst a Poisson distribution is used for galaxy...
Does the Fornax dwarf spheroidal have a central cusp or core? (2006)
Goerdt, Tobias, Moore, Ben, Read, J. I., Stadel, Joachim, Zemp, Marcel
The dark matter dominated Fornax dwarf spheroidal has five globular clusters orbiting at ~1 kpc from its centre. In a cuspy CDM halo the globulars would sink to the centre from their current...
Angular momentum transport and disk morphology in SPH simulations of galaxy formation (2006)
Kaufmann, Tobias, Mayer, Lucio, Wadsley, James, Stadel, Joachim, Moore, Ben
We perform controlled N-Body/SPH simulations of disk galaxy formation by cooling a rotating gaseous mass distribution inside equilibrium cuspy spherical and triaxial dark matter halos. We...
Weinmann, Simone M., Van Den Bosch, Frank C., Yang, Xiaohu, Mo, H. J., Croton, Darren J., Moore, Ben
Successfully reproducing the galaxy luminosity function (LF) and the bimodality in the galaxy distribution requires a mechanism that can truncate star formation in massive haloes. Current models of...
Merritt, David, Graham, Alister W., Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Empirical models for dark matter halos II : inner profile slopes, dynamical profiles, and ρ/σ (2006)
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Empirical models for dark matter halos III : the Kormendy relation and the log (2006)
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Empirical models for dark matter halos II : inner profile slopes, dynamical profiles, and ρ/σ (2006)
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Empirical models for dark matter halos III : the Kormendy relation and the log (2006)
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Merritt, David, Graham, Alister W., Moore, Ben, Diemand, Jurg, Terzic, Balsa
We use techniques from nonparametric function estimation theory to extract the density profiles, and their derivatives, from a set of N-body dark matter halos. We consider halos generated from ΛCDM...
Empirical models for dark matter halos II : inner profile slopes, dynamical profiles, and ρ/σ (2006)
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Empirical models for dark matter halos III : the Kormendy relation and the log (2006)
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Merritt, David, Graham, Alister W., Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Merritt, David, Graham, Alister W., Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Empirical models for dark matter halos II : inner profile slopes, dynamical profiles, and ρ/σ (2006)
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Empirical models for dark matter halos III : the Kormendy relation and the log (2006)
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Merritt, David, Graham, Alister W., Moore, Ben, Diemand, Jurg, Terzic, Balsa
We use techniques from nonparametric function estimation theory to extract the density profiles, and their derivatives, from a set of N-body dark matter halos. We consider halos generated from ΛCDM...
Empirical models for dark matter halos II : inner profile slopes, dynamical profiles, and ρ/σ (2006)
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Empirical models for dark matter halos III : the Kormendy relation and the log (2006)
Graham, Alister W., Merritt, David, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Abstract not available.
Weinmann, Simone M., Van Den Bosch, Frank C., Yang, Xiaohu, Mo, H. J., Croton, Darren J., Moore, Ben
Successfully reproducing the galaxy luminosity function (LF) and the bimodality in the galaxy distribution requires a mechanism that can truncate star formation in massive haloes. Current models of...
Globular clusters, satellite galaxies and stellar haloes from early dark matter peaks (2005)
Moore, Ben, Diemand, Juerg, Madau, Piero, Zemp, Marcel, Stadel, Joachim
The Milky Way contains several distinct old stellar components that provide a fossil record of its formation. We can understand their spatial distribution and kinematics in a hierarchical formation...
A universal density slope - velocity anisotropy relation (2005)
Hansen, Steen H., Moore, Ben, Stadel, Joachim
One can solve the Jeans equation analytically for equilibrated dark matter structures, once given two pieces of input from numerical simulations. These inputs are 1) a connection between phase-space...
The origin of polar ring galaxies: evidence for galaxy formation by cold accretion (2005)
Maccio', Andrea V., Moore, Ben, Stadel, Joachim
Polar ring galaxies are flattened stellar systems with an extended ring of gas and stars rotating in a plane almost perpendicular to the central galaxy. We show that their formation can occur...
Merritt, David, Graham, Alister W., Moore, Ben, Diemand, Juerg, Terzic, Balsa
We use techniques from nonparametric function estimation theory to extract the density profiles, and their derivatives, from a set of N-body dark matter halos. We consider halos generated from LCDM...
The Secular Evolution of Disk Structural Parameters (2005)
Debattista, Victor P., Mayer, Lucio, Carollo, C. Marcella, Moore, Ben, Wadsley, James, Quinn, Thomas
We present a comprehensive series of $N$-body as well as $N$-body + SPH simulations to study the secular evolution of the structure of disk galaxies. Our simulations are organized in a hierarchy of...
Kaufmann, Tobias, Mayer, Lucio, Wadsley, James, Stadel, Joachim, Moore, Ben
We study the formation of disks via the cooling flow of gas within galactic haloes using smoothed particle hydrodynamics simulations. These simulations resolve mass scales of a few thousand solar...
Diemand, Juerg, Madau, Piero, Moore, Ben
We show that the hierarchical assembly of cold dark matter (CDM) haloes preserves the memory of the initial conditions. Using N-body cosmological simulations, we demonstrate that the present-day...
Maccio', Andrea V., Moore, Ben, Stadel, Joachim, Diemand, Juerg
We analyse the number density and radial distribution of substructures and satellite galaxies using cosmological simulations that follow the gas dynamics of a baryonic component, including shock...
A universal velocity distribution of relaxed collisionless structures (2005)
Hansen, Steen H., Moore, Ben, Zemp, Marcel, Stadel, Joachim
Several general trends have been identified for equilibrated, self-gravitating collisionless systems, such as density or anisotropy profiles. These are integrated quantities which naturally depend on...
The Kinematic Signature of Face-On Peanut-Shaped Bulges (2005)
Debattista, Victor P., Carollo, C. Marcella, Mayer, Lucio, Moore, Ben
We present a kinematic diagnostic for peanut-shaped bulges in nearly face-on galaxies. The face-on view provides a novel perspective on peanuts which would allow study of their relation to bars and...
Simultaneous ram pressure and tidal stripping; how dwarf spheroidals lost their gas (2005)
Mayer, Lucio, Mastropietro, Chiara, Wadsley, James, Stadel, Joachim, Moore, Ben
We perform high-resolution N-Body+SPH simulations of gas-rich dwarf galaxy satellites orbiting within a Milky Way-sized halo and study for the first time the combined effects of tides and ram...
Diemand, Juerg, Zemp, Marcel, Moore, Ben, Stadel, Joachim, Carollo, Marcella
We resolve the inner region of a massive cluster forming in a cosmological LCDM simulation with a mass resolution of 2*10^6 Msun and before z=4.4 even 3*10^5 Msun. This is a billion times less than...
On the survival and disruption of Earth mass CDM micro-haloes (2005)
Moore, Ben, Diemand, Juerg, Stadel, Joachim, Quinn, Thomas
Neutralino dark matter leads to the formation of numerous earth mass dark matter haloes at redshifts z\approx 60 (Diemand et al. 2005). These abundant CDM micro-haloes have cuspy density profiles...
Earth-mass dark-matter haloes as the first structures in the early Universe (2005)
Diemand, Juerg, Moore, Ben, Stadel, Joachim
The Universe was nearly smooth and homogeneous before a redshift of z = 100, about 20 million years after the Big Bang. After this epoch, the tiny fluctuations imprinted upon the matter distribution...
Tidal streams in a MOND potential: constraints from Sagittarius (2005)
We compare orbits in a thin axisymmetric disc potential in MOND to those in a thin disc plus near-spherical dark matter halo predicted by a $\Lambda$CDM cosmology. Remarkably, the amount of orbital...
Empirical models for dark matter halos (2005)
Merritt, David, Graham, Alister, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Archived in: arXiv:astro-ph/0509417 v1 15 Sep 2005
Empirical models for dark matter halos (2005)
Merritt, David, Graham, Alister, Moore, Ben, Diemand, Jurg, Terzic, Balsa
Archived in: arXiv:astro-ph/0509417 v1 15 Sep 2005
Software Engineering for a High-Performance Parallel Astrophysical Visualization Tool (2005)
Thomas Kühne, Supervised Prof, Ben Moore, Dr. Joachim Stadel, Thomas Kühne
In this thesis, I present and document the underlying design and the performance of Hubble in a Bottle!, a high-performance real-time visualization tool for astrophysical TIPSY files. The data can be...
High resolution SPH simulations of disk formation in CDM halos; resolution tests (2004)
Kaufmann, Tobias, Mayer, Lucio, Moore, Ben, Stadel, Joachim, Wadsley, James
We perform N-Body/SPH simulations of disk galaxy formation inside equilibrium spherical and triaxial cuspy dark matter halos. We systematically study the disk properties and morphology as we increase...
The gravitational and hydrodynamical interaction between the LMC and the Galaxy (2004)
Mastropietro, Chiara, Moore, Ben, Mayer, Lucio, Wadsley, James, Stadel, Joachim
We use high resolution N-Body/SPH simulations to study the hydrodynamical and gravitational interaction between the Large Magellanic Cloud and the Milky Way. We model the dark and hot extended halo...
Morphological evolution of disk galaxies in clusters (2004)
Mastropietro, Chiara, Moore, Ben, Mayer, Lucio, Debattista, Victor P., Piffaretti, Rocco, Stadel, Joachim
The recent discovery of hidden non-axysimmetric and disk-like structures in bright Virgo dwarf elliptical and lenticular galaxies (dE/dSph/dS0) indicates that they may have late-type progenitors....
A universal density slope - velocity anisotropy relation for relaxed structures (2004)
We identify a universal relation between the radial density slope \alpha (r) and the velocity anisotropy \beta (r) for equilibrated structures. This relation holds for a variety of systems, including...
Kazantzidis, Stelios, Mayer, Lucio, Colpi, Monica, Madau, Piero, Debattista, Victor P., Wadsley, James, ...
We analyze the effect of dissipation on the orbital evolution of supermassive black holes (SMBHs) using high-resolution self-consistent gasdynamical simulations of binary equal- and unequal-mass...
On the age-radius relation and orbital history of cluster galaxies (2004)
Moore, Ben, Diemand, Juerg, Stadel, Joachim
We explore the region of influence of a galaxy cluster using numerical simulations of cold dark matter halos. Many of the observed galaxies in a cluster are expected to be infalling for the first...
The Effect of Gas Cooling on the Shapes of Dark Matter Halos (2004)
Kazantzidis, Stelios, Kravtsov, Andrey V., Zentner, Andrew R., Allgood, Brandon, Nagai, Daisuke, Moore, Ben
We analyze the effect of dissipation on the shapes of dark matter (DM) halos using high-resolution cosmological gasdynamics simulations of clusters and galaxies in the LCDM cosmology. We find that...
Bulges or Bars from Secular Evolution? (2004)
Debattista, Victor P., Carollo, C. Marcella, Mayer, Lucio, Moore, Ben
We use high resolution collisionless $N$-body simulations to study the secular evolution of disk galaxies and in particular the final properties of disks that suffer a bar and perhaps a bar-buckling...
Convergence and scatter of cluster density profiles (2004)
Diemand, Juerg, Moore, Ben, Stadel, Joachim
We present new results from a series of LCDM simulations of cluster mass halos resolved with high force and mass resolution. These results are compared with recently published simulations from groups...
Velocity and spatial biases in CDM subhalo distributions (2004)
Diemand, Juerg, Moore, Ben, Stadel, Joachim
We present a statistical study of substructure within a sample of LCDM clusters and galaxies simulated with up to 25 million particles. With thousands of subhalos per object we can accurately measure...
Kazantzidis, Stelios, Mayer, Lucio, Mastropietro, Chiara, Diemand, Juerg, Stadel, Joachim, Moore, Ben
The structural evolution of substructure in cold dark matter (CDM) models is investigated combining ``low-resolution'' satellites from cosmological N-body simulations of parent halos with N=10^7...
Faint galaxy population in clusters: X-ray emission, cD halos and projection effects (2003)
Valotto, Carlos A., Muriel, Hernan, Moore, Ben, Lambas, Diego G.
We analyze samples of nearby clusters taken from the Abell catalog and the X-ray Sample of Bright Clusters(De Grandi et al 1999) including a wide range of X-ray luminosities.Using the usually adopted...
The origin and tidal evolution of cuspy triaxial haloes (2003)
Moore, Ben, Kazantzidis, Stelios, Diemand, Juerg, Stadel, Joachim
We present a technique for constructing equilibrium triaxial N-body haloes with nearly arbitrary density profiles, axial ratios and spin parameters. The method is based on the way in which structures...
Generating Equilibrium Dark Matter Halos: Inadequacies of the Local Maxwellian Approximation (2003)
Kazantzidis, Stelios, Magorrian, John, Moore, Ben
We describe an algorithm for constructing N-body realizations of equilibrium spherical systems. A general form for the mass density rho(r) is used, making it possible to represent most of the popular...
We show that a global relation between baryonic mass and virial velocity can be constructed from the scale of dwarf galaxies up to that of rich galaxy clusters. The slope of this relation is close to...
Galaxies and Overmerging: What Does it Take to Destroy a Satellite Galaxy? (2003)
Kazantzidis, Stelios, Moore, Ben, Mayer, Lucio
The Ultra Compact Dwarf (UCD) galaxies recently discovered in the Fornax and Virgo clusters exhibit structural similarity to the dense nuclei of nucleated dEs indicating that the progenitor galaxy...
Evolutionary processes in clusters (2003)
Are the morphologies of galaxies imprinted during an early and rapid formation epoch or are they due to environmental processes that subsequently transform galaxies between morphological classes?...
Two body relaxation in CDM simulations (2003)
Diemand, Juerg, Moore, Ben, Stadel, Joachim, Kazantzidis, Stelios
N-body simulations of the hierarchical formation of cosmic structures suffer from the problem that the first objects to form always contain just a few particles. Although relaxation is not an issue...
In-cycle control of the thermoforming reheat process / (2002)
Written for the Dept. of Electrical and Computer Engineering.
Czoske, Oliver, Moore, Ben, Kneib, Jean-Paul, Soucail, Genevieve
The mass distribution of the rich cluster of galaxies Cl0024+1654 has frequently been used to constrain the nature of dark matter yet a model consistent with all the observational data has been...
Tidal debris of dwarf spheroidals as a probe of structure formation models (2001)
Mayer, Lucio, Moore, Ben, Quinn, Thomas, Governato, Fabio, Stadel, Joachim
Recent observations suggest that Carina and other nearby dwarf spheroidal galaxies are surrounded by unbound stars tidally stripped by the Milky Way. We run high-resolution N-Body simulations of...
Dark matter in Draco and the Local Group: Implications for direct detection experiments (2001)
Moore, Ben, Calcaneo-Roldan, Carlos, Stadel, Joachim, Quinn, Tom, Lake, George, Ghigna, Sebastiano, ...
We use a cosmological simulation of the Local Group to make quantitative and speculative predictions for direct detection experiments. Cold dark matter (CDM) halos form via a complex series of...
Where are the high velocity clouds? (2001)
Recent observations of high velocity clouds (HVCs) have revealed compression fronts and tail shaped features of HI suggesting that they are interacting with external medium. We perform 3-D...
Is Cold Dark Matter Still a Strong Buy? The Lesson from Galaxy Clusters (2001)
Governato, Fabio, Ghigna, Sebastiano, Moore, Ben
For the last few years the Cold Dark Matter model (ticker: CDM), has been the dominant theory of structure formation. We briefly review the recent advancements and predictions of the model in the...
The Metamorphosis of Tidally Stirred Dwarf Galaxies (2001)
Mayer, Lucio, Governato, Fabio, Colpi, Monica, Moore, Ben, Quinn, Thomas, Wadsley, James, ...
We present results from high-resolution N-Body/SPH simulations of rotationally supported dwarf irregular galaxies moving on bound orbits in the massive dark matter halo of the Milky Way.The dwarf...
Caustic Rings and Cold Dark Matter (2001)
The hierarchical cold dark matter (CDM) model for structure formation is a well defined and testable model. Direct detection is the best technique for confirming the model yet predictions for the...
I explore several possible solutions to the ``missing satellites'' problem that challenges the collisionless cold dark matter model.
Turning Over a New Leaf: The Ecological Awareness of Novelle and Walden (2001)
Bi-College (Haverford and Bryn Mawr Colleges). Comparative Literature Program
Tidal stirring and the origin of dwarf spheroidals in the Local Group (2000)
Mayer, Lucio, Governato, Fabio, Colpi, Monica, Moore, Ben, Quinn, Tom, Wadsley, James, ...
N-Body/SPH simulations are used to study the evolution of dwarf irregular galaxies (dIrrs) entering the dark matter halo of the Milky Way or M31 on plunging orbits. We propose a new dynamical...
Calcaneo-Roldan, Carlos, Moore, Ben
We use high resolution numerical simulations of the formation of cold dark matter halos to simulate the background of decay products from neutralino annihilation, such as gamma-rays or neutrinos....
Simulating clusters of galaxies: a brief history of `N' and overmerging (2000)
I review four decades of numerical simulations of galaxy clusters focussing on the attempts to resolve their internal structure. Overmerging describes the numerical or physical disruption of dark...
Dynamical effects on galaxies in clusters (2000)
Moore, Ben, Quilis, Vicent, Bower, Richard
The observed morphological evolution since z ~ 0.5 within galaxy clusters provides evidence for a hierarchical universe. This evolution is driven by dynamical effects that operate within the cluster...
Do clusters contain a large population of dwarf galaxies? (2000)
Valotto, Carlos A., Moore, Ben, Lambas, Diego G.
We analyze systematic effects in the determination of the galaxy luminosity function in clusters using a deep mock catalogue constructed from a numerical simulation of a hierarchical universe. The...
Gone with the wind: the origin of S0 galaxies in clusters (2000)
Quilis, Vicent, Moore, Ben, Bower, Richard
We present the first 3-dimensional high resolution hydro-dynamical simulations of the interaction between the hot ionised intra-cluster medium and the cold interstellar medium of spiral galaxies. Ram...
Collisional versus Collisionless Dark Matter (2000)
Moore, Ben, Gelato, Sergio, Jenkins, Adrian, Pearce, F. R., Quilis, Vicent
We compare the structure and substructure of dark matter halos in model universes dominated by collisional, strongly self interacting dark matter (SIDM) and collisionless, weakly interacting dark...
Ghigna, Sebastiano, Moore, Ben, Governato, Fabio, Lake, George, Quinn, Tom, Stadel, Joachim
Can N-body simulations reliably determine the structural properties of dark matter halos? Focussing on a Virgo-sized galaxy cluster, we increase the resolution of current ``high resolution...
Dark Matter Substructure in Galactic Halos (1999)
Moore, Ben, Ghigna, Sebastiano, Governato, Fabio, Lake, George, Quinn, Tom, Stadel, Joachim, ...
We use numerical simulations to examine the substructure within galactic and cluster mass halos that form within a hierarchical universe. Clusters are easily reproduced with a steep mass spectrum of...
Ram Pressure Stripping of Spiral Galaxies in Clusters (1999)
Abadi, Mario G., Moore, Ben, Bower, Richard G.
We use 3-dimensional SPH/N-BODY simulations to study ram pressure stripping of gas from spiral galaxies orbiting in clusters. We find that the analytic expectation of Gunn & Gott (1972) relating the...
The morphological evolution of galaxy satellites (1999)
Mayer, Lucio, Governato, Fabio, Colpi, Monica, Moore, Ben, Quinn, Thomas R., Baugh, Carlton M.
We study the evolution of galaxy satellites with high resolution N-body simulations. Satellites are modeled as replicas of typical low and high surface brightness galaxies (LSBs and HSBs). Encounters...
Cold collapse and the core catastrophe (1999)
Moore, Ben, Quinn, Tom, Governato, Fabio, Stadel, Joachim, Lake, George
We show that a universe dominated by cold dark matter fails to reproduce the rotation curves of dark matter dominated galaxies, one of the key problems that it was designed to resolve. We perform...
The fate of LSB galaxies in clusters and the origin of the diffuse intra-cluster light (1999)
Moore, Ben, Lake, George, Stadel, Joachim, Quinn, Thomas
We follow the evolution of disk galaxies within a cluster that forms hierarchically in a standard cold dark matter N-body simulation. At a redshift z=0.5 we select several dark matter halos that have...
Ben Moore, Thomas Quinn Joachim, Joachim Stadel
We follow the evolution of disk galaxies within a cluster that forms hierarchically in a cold dark matter N-body simulation. At a redshift z = 0:5 we select several dark matter halos that have quiet...
Galaxy destruction and diffuse light in clusters (1998)
Calcaneo-Roldan, Carlos, Moore, Ben, Bland-Hawthorn, J., Malin, David, Sadler, Elaine M.
Deep images of the Centaurus and Coma clusters reveal two spectacular arcs of diffuse light that stretch for over 100 kpc, yet are just a few kpc wide. At a surface brightness of m_b \sim 27-28th...
On the Survival and Destruction of Spiral Galaxies in Clusters (1998)
Moore, Ben, Lake, George, Quinn, Thomas, Stadel, Joachim
We follow the evolution of disk galaxies within a cluster that forms hierarchically in a cold dark matter N-body simulation. At a redshift z=0.5 we select several dark matter halos that have quiet...
Dark Matter Halos within Clusters (1998)
Ghigna, Sebastiano, Moore, Ben, Governato, Fabio, Lake, George, Quinn, Thomas, Stadel, Joachim
We examine the properties of dark matter halos within a rich galaxy cluster using a high resolution simulation that captures the cosmological context of a cold dark matter universe. The mass and...
The Structure and Dynamics of Cold Dark Matter Halos (1997)
Moore, Ben, Ghigna, Sebastiano, Governato, Fabio, Lake, George, Quinn, Tom, Stadel, Joachim
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 become steeper,...
Resolving the Structure of Cold Dark Matter Halos (1997)
Moore, Ben, Governato, Fabio, Quinn, Tom, Stadel, Joachim, Lake, George
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 mass and force...
Morphological Transformation from Galaxy Harassment (1997)
Moore, Ben, Lake, George, Katz, Neal
Galaxy morphologies in clusters have undergone a remarkable transition over the past several billion years. Distant clusters at $z \sim 0.4$ are filled with small spiral galaxies, many of which are...
The Formation of Quasars in Low Luminosity Hosts via Galaxy Harassment (1997)
Lake, George, Katz, Neal, Moore, Ben
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 provides an...
The detection of stars in the process of being tidally removed from globular clusters and dwarf spheroidals in the Galaxy's halo provides a strong constraint on their mass to light ratios and on the...
Galaxy Harassment and the Evolution of Clusters of Galaxies (1995)
Moore, Ben, Katz, Neal, Lake, George, Dressler, Alan, Oemler, Augustus
Disturbed spiral galaxies with high rates of star formation pervaded clusters of galaxies just a few billion years ago, but nearby clusters exclude spirals in favor of ellipticals. ``Galaxy...
On the Destruction and Over-Merging of Dark Halos in Dissipationless N-body Simulations (1995)
Moore, Ben, Katz, Neal, Lake, George
N-body simulations that follow only a collisionless dark matter component have failed to produce galaxy halos or substructure within dense environments. We investigate the `over-merging' problem...
If the halo dark matter consists of faint baryonic stars, then these objects probably formed at an early epoch within large associations with similar dynamical properties to globular or open...
The Clustering Properties of IRAS Galaxies (1994)
Moore, Ben, Frenk, Carlos, Efstathiou, George, Saunders, Will
We investigate the clustering of galaxies in the QDOT redshift survey of IRAS galaxies. We find that the redshift space two-point correlation function is well approximated by a power-law of slope...
The Nature Of Dark Matter (1994)
Collisionless particles, such as cold dark matter, interact only by gravity and do not have any associated length scale, therefore the dark halos of galaxies should have negligible core radii. This...
The Origin of the Magellanic Stream (1994)
SHORTENED ABSTRACT: We present numerical investigations designed to critically test models of the origin of the Magellanic Stream. The most developed model is the tidal model which fails to reproduce...
Thesis (Ph. D.)--University of Nottingham, 1994.
An Upper Limit to the Mass of Black Holes in the Halo of our Galaxy (1993)
If massive black holes constitute the dark matter in the halo surrounding the Milky Way, the existence of low mass globular clusters in the halo suggests an upper limit to their mass, $M_{_{BH}}$. We...
Groups, clusters and superclusters of Galaxies. (1991)
Thesis (Ph. D.)--University of Durham, 1991.