Publications (138)
Convergence and scatter of cluster density profiles
Juerg Diemand, Ben Moore, Joachim Stadel
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 simu…
Dynamical effects on galaxies in clusters
Ben Moore, Vicent Quilis, Richard Bower
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…
Formation and accretion history of terrestrial planets from runaway growth through to late time: implications for orbital eccentricity
Ryuji Morishima, Max W. Schmidt, Joachim Stadel +1
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 po…
Influence of Orbital Behaviour and Chaos on the Shape of Dark Matter Halos
Andrea V. Maccio', Ioannis Sideris, Marco Miranda +2
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 a…
Dark Satellites and Cosmic Reionization
Andrea V. Maccio', Ben Moore, Joachim Stadel +1
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. W…
High resolution SPH simulations of disk formation in CDM halos; resolution tests
Tobias Kaufmann, Lucio Mayer, Ben Moore +2
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 morpho…
Empirical models for Dark Matter Halos. I. Nonparametric Construction of Density Profiles and Comparison with Parametric Models
David Merritt, Alister W. Graham, Ben Moore +2
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 ge…
The formation of disc galaxies in a LCDM universe
Oscar Agertz, Romain Teyssier, Ben Moore
We study the formation of disc galaxies in a fully cosmological framework using adaptive mesh refinement simulations. We perform an extensive parameter study of the main subgrid pr…
Where are the high velocity clouds?
Vicent Quilis, Ben Moore
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 per…
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…
Tidal stirring and the origin of dwarf spheroidals in the Local Group
Lucio Mayer, Fabio Governato, Monica Colpi +5
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 ne…
The baryonic mass-velocity relation; clues to feedback processes during structure formation and the cosmic baryon inventory
Lucio Mayer, Ben Moore
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 r…
Stochasticity & Predictability in Terrestrial Planet Formation
Volker Hoffmann, Simon L. Grimm, Ben Moore +1
Terrestrial planets are thought to be the result of a vast number of gravitational interactions and collisions between smaller bodies. We use numerical simulations to show that pra…
Effects of ram pressure on the gas distribution and star formation in the Large Magellanic Cloud
Chiara Mastropietro, Andreas Burkert, Ben Moore
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 whe…
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…
Quenching-driven equatorial depletion and limb asymmetries in hot Jupiter atmospheres: WASP-96b example
Maria Zamyatina, Duncan A. Christie, Eric Hébrard +11
Transport-induced quenching in hot Jupiter atmospheres is a process that determines the boundary between the part of the atmosphere at chemical equilibrium and the part of the atmo…
Dynamical and Observable Constraints on RAMBOs: Robust Associations of Massive Baryonic Objects
Ben Moore, Joseph Silk
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 globul…
A wide-field spectroscopic survey of the cluster of galaxies Cl0024+1654. II. A high-speed collision?
Oliver Czoske, Ben Moore, Jean-Paul Kneib +1
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…
Reionization of the Local Group of Galaxies
Ilian T. Iliev, Ben Moore, Stefan Gottloeber +3
We present the first detailed structure formation and radiative transfer simulations of the reionization history of our cosmic neighbourhood. To this end, we follow the formation o…
From planetesimals to terrestrial planets: N-body simulations including the effects of nebular gas and giant planets
Ryuji Morishima, Joachim Stadel, Ben Moore
We present results from a suite of N-body simulations that follow the accretion history of the terrestrial planets using a new parallel treecode that we have developed. We initiall…
The Causes of Halo Shape Changes Induced by Cooling Baryons: Disks Versus Substructures
Victor P. Debattista, Ben Moore, Thomas Quinn +5
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 round…
An Upper Limit to the Mass of Black Holes in the Halo of our Galaxy
Ben Moore
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 ma…
Central mass and luminosity of Milky Way satellites in the LCDM model
Andrea V. Maccio', Xi Kang, Ben Moore
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 (Mate…
Mass Distribution in Galaxy Clusters: the Role of AGN Feedback
Romain Teyssier, Ben Moore, Davide Martizzi +2
We use 1 kpc resolution cosmological AMR simulations of a Virgo-like galaxy cluster to investigate the effect of feedback from supermassive black holes (SMBH) on the mass distribut…
An optimum time-stepping scheme for N-body simulations
Marcel Zemp, Joachim Stadel, Ben Moore +1
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 i…
Two body relaxation in CDM simulations
Juerg Diemand, Ben Moore, Joachim Stadel +1
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 relaxatio…
Empirical Models for Dark Matter Halos. III. The Kormendy relation and the log(rho_e)-log(R_e) relation
Alister W. Graham, David Merritt, Ben Moore +2
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 NF…
On the Destruction and Over-Merging of Dark Halos in Dissipationless N-body Simulations
Ben Moore, Neal Katz, George Lake
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-me…
Toward an accurate mass function for precision cosmology
Darren S. Reed, Robert E. Smith, Doug Potter +3
Cosmological surveys aim to use the evolution of the abundance of galaxy clusters to accurately constrain the cosmological model. In the context of LCDM, we show that it is possibl…
The structure and evolution of cold dark matter halos
Jürg Diemand, Ben Moore
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 produce…
The survival and disruption of CDM micro-haloes: implications for direct and indirect detection experiments
Tobias Goerdt, Oleg Y. Gnedin, Ben Moore +2
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} -…
Radial distribution and strong lensing statistics of satellite galaxies and substructure using high resolution LCDM hydrodynamical simulations
Andrea V. Maccio', Ben Moore, Joachim Stadel +1
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, i…
The de Rham period map for punctured elliptic curves and the KZB equation
Ben Moore
We demonstrate that the algebraic KZB connection of Levin--Racinet and Luo on a once-punctured elliptic curve represents Kim's universal unipotent connection, and we observe that t…
Dark matter in Draco and the Local Group: Implications for direct detection experiments
Ben Moore, Carlos Calcaneo-Roldan, Joachim Stadel +4
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 compl…
The origin and tidal evolution of cuspy triaxial haloes
Ben Moore, Stelios Kazantzidis, Juerg Diemand +1
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…
The Metamorphosis of Tidally Stirred Dwarf Galaxies
Lucio Mayer, Fabio Governato, Monica Colpi +5
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 Milk…
The Secular Evolution of Disk Structural Parameters
Victor P. Debattista, Lucio Mayer, C. Marcella Carollo +3
We present a comprehensive series of -body as well as -body + SPH simulations to study the secular evolution of the structure of disk galaxies. Our simulations are organized…
A universal density slope - velocity anisotropy relation
Steen H. Hansen, Ben Moore, Joachim Stadel
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 b…
Precision cosmology in muddy waters: Cosmological constraints and N-body codes
Robert E. Smith, Darren S. Reed, Doug Potter +3
Future large-scale structure surveys of the Universe will aim to constrain the cosmological model and the true nature of dark energy with unprecedented accuracy. In order for these…
Galaxies and Overmerging: What Does it Take to Destroy a Satellite Galaxy?
Stelios Kazantzidis, Ben Moore, Lucio Mayer
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 p…
Properties of Galaxy Groups in the SDSS: II.- AGN Feedback and Star Formation Truncation
Simone M. Weinmann, Frank C. van den Bosch, Xiaohu Yang +3
Successfully reproducing the galaxy luminosity function and the bimodality in the galaxy distribution requires a mechanism that can truncate star formation in massive haloes. Curre…
Dependence of the Local Reionization History on Halo Mass and Environment: Did Virgo Reionize the Local Group?
Simone M. Weinmann, Andrea V. Maccio', Ilian T. Iliev +2
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 t…
Galactic Dynamics and Local Dark Matter
Steven R. Majewski, James Bullock, Andreas Burkert +13
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 la…
A Systematic Look at the Effects of Radiative Feedback on Disc Galaxy Formation
Rok Roškar, Romain Teyssier, Oscar Agertz +2
Galaxy formation models and simulations rely on various feedback mechanisms to reproduce the observed baryonic scaling relations and galaxy morphologies. Although dwarf galaxy and…
Fate of Supermassive Black Holes and Evolution of the M(BH)-sigma Relation in Merging Galaxies: The Effect of Gaseous Dissipation
Stelios Kazantzidis, Lucio Mayer, Monica Colpi +6
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- an…
A proof of the Landsberg-Schaar relation by finite methods
Ben Moore
The Landsberg-Schaar relation is a classical identity between quadratic Gauss sums, normally used as a stepping stone to prove quadratic reciprocity. The Landsberg-Schaar relation…
The Graininess of Dark Matter Haloes
Marcel Zemp, Jürg Diemand, Michael Kuhlen +5
We use the recently completed one billion particle Via Lactea II LambdaCDM simulation to investigate local properties like density, mean velocity, velocity dispersion, anisotropy,…
The fate of LSB galaxies in clusters and the origin of the diffuse intra-cluster light
Ben Moore, George Lake, Joachim Stadel +1
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 mat…
Cores in warm dark matter haloes: a Catch 22 problem
Andrea V. Maccio', Sinziana Paduroiu, Donnino Anderhalden +2
The free streaming of warm dark matter particles dampens the fluctuation spectrum, flattens the mass function of haloes and imprints a fine grained phase density limit for dark mat…
Does the Fornax dwarf spheroidal have a central cusp or core?
Tobias Goerdt, Ben Moore, J. I. Read +2
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 the…
Cold collapse and the core catastrophe
Ben Moore, Tom Quinn, Fabio Governato +2
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 reso…
The morphological evolution of galaxy satellites
Lucio Mayer, Fabio Governato, Monica Colpi +3
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 an…
The gravitational and hydrodynamical interaction between the LMC and the Galaxy
Chiara Mastropietro, Ben Moore, Lucio Mayer +2
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…
Modular forms, projective structures, and the four squares theorem
Michael Eastwood, Ben Moore
It is well-known that Lagrange's four-square theorem, stating that every natural number may be written as the sum of four squares, may be proved using methods from the classical th…
Is Cold Dark Matter Still a Strong Buy? The Lesson from Galaxy Clusters
Fabio Governato, Sebastiano Ghigna, Ben Moore
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 t…
The Clustering Properties of IRAS Galaxies
Ben Moore, Carlos Frenk, George Efstathiou +1
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 pow…
The Kinematic Signature of Face-On Peanut-Shaped Bulges
Victor P. Debattista, C. Marcella Carollo, Lucio Mayer +1
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 rel…
On the Stability of Tidal Streams
Aurel Schneider, Ben Moore
We explore the stability of tidal streams to perturbations, motivated by recent claims that the clumpy structure of the stellar streams surrounding the globular cluster Palomar 5 a…
The surface brightness of dark matter: unique signatures of neutralino annihilation in the Galactic halo
Carlos Calcaneo-Roldan, Ben Moore
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-ray…
Morphological evolution of disk galaxies in clusters
Chiara Mastropietro, Ben Moore, Lucio Mayer +3
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-ty…
On the origin of elemental abundances in the terrestrial planets
Sebastian Elser, Michael R. Meyer, Ben Moore
The abundances of elements in the Earth and the terrestrial planets provide the initial conditions for life and clues as to the history and formation of the Solar System. We follow…
Properties of Dark Matter Revealed by Astrometric Measurements of the Milky Way and Local Galaxies
Edward Shaya, Robert Olling, Massimo Ricotti +19
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 confr…
Faint galaxy population in clusters: X-ray emission, cD halos and projection effects
Carlos A. Valotto, Hernan Muriel, Ben Moore +1
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…
Brightest Cluster Galaxies in Cosmological Simulations with Adaptive Mesh Refinement: Successes and Failures
Davide Martizzi, Jimmy, Romain Teyssier +1
A large sample of cosmological hydrodynamical zoom-in simulations with Adaptive Mesh Refinement (AMR) is analysed to study the properties of simulated Brightest Cluster Galaxies (B…
Bulges or Bars from Secular Evolution?
Victor P. Debattista, C. Marcella Carollo, Lucio Mayer +1
We use high resolution collisionless -body simulations to study the secular evolution of disk galaxies and in particular the final properties of disks that suffer a bar and perh…
On the Survival and Destruction of Spiral Galaxies in Clusters
Ben Moore, George Lake, Thomas Quinn +1
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…
Internal Alignments of Red Versus Blue Discs in Dark Matter Halos
Victor P. Debattista, Frank C. van den Bosch, Rok Roskar +3
Large surveys have shown that red galaxies are preferentially aligned with their halos while blue galaxies have a more isotropic distribution. Since halos generally align with thei…
Multi-Wavelength Properties of Barred Galaxies in the Local Universe: Environment and evolution across the Hubble sequence
Lea Giordano, Kim-Vy H. Tran, Ben Moore +1
We investigate possible environmental and morphological trends in the bar fraction using two carefully selected samples representative of a low-density environment (the is…
The Origin of the Magellanic Stream
Ben Moore, Marc Davis
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…
Large scale galactic turbulence: can self-gravity drive the observed HI velocity dispersions?
Oscar Agertz, George Lake, Romain Teyssier +3
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 gal…
The Nature Of Dark Matter
Ben Moore
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…
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,…
Ram Pressure Stripping of Spiral Galaxies in Clusters
Mario G. Abadi, Ben Moore, Richard G. Bower
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 (…
Earth-mass dark-matter haloes as the first structures in the early Universe
Juerg Diemand, Ben Moore, Joachim Stadel
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 m…
On the age-radius relation and orbital history of cluster galaxies
Ben Moore, Juerg Diemand, Joachim Stadel
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 infallin…
Core creation in galaxies and haloes via sinking massive objects
Tobias Goerdt, Ben Moore, J. I. Read +1
We perform a detailed investigation into the disruption of central cusps via the transfer of energy from sinking massive objects. Constant density inner regions form at the radius…
Velocity and spatial biases in CDM subhalo distributions
Juerg Diemand, Ben Moore, Joachim Stadel
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…
Evolutionary processes in clusters
Ben Moore
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 morphol…
The origin of polar ring galaxies: evidence for galaxy formation by cold accretion
Andrea V. Maccio', Ben Moore, Joachim Stadel
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 formatio…
Disk formation and the origin of clumpy galaxies at high redshift
Oscar Agertz, Romain Teyssier, Ben Moore
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 st…
Multi-Wavelength Properties of Barred Galaxies in the Local Universe. I: Virgo Cluster
Lea Giordano, Kim-Vy H. Tran, Ben Moore +1
We study in detail how the barred galaxy fraction varies as a function of luminosity, HI gas mass, morphology and color in the Virgo cluster in order to provide a well defined, sta…
Discreteness Effects in Lambda Cold Dark Matter Simulations: A Wavelet-Statistical View
Alessandro B. Romeo, Oscar Agertz, Ben Moore +1
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, tak…
A systematic survey of Moon-forming giant impacts: Non-rotating bodies
Miles Timpe, Christian Reinhardt, Thomas Meier +2
In the leading theory of lunar formation, known as the giant impact hypothesis, a collision between two planet-size objects resulted in a young Earth surrounded by a circumplanetar…
The dark matter crisis
Ben Moore
I explore several possible solutions to the ``missing satellites'' problem that challenges the collisionless cold dark matter model.
Galaxy Harassment and the Evolution of Clusters of Galaxies
Ben Moore, Neal Katz, George Lake +2
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 destruction and diffuse light in clusters
Carlos Calcaneo-Roldan, Ben Moore, J. Bland-Hawthorn +2
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…
Estimating the dark matter velocity anisotropy to the cluster edge
Jacob Svensmark, Steen H. Hansen, Davide Martizzi +2
Dark matter dominates the properties of large cosmological structures such as galaxy clusters, and the mass profiles of the dark matter have been measured for these equilibrated st…
On the survival and disruption of Earth mass CDM micro-haloes
Ben Moore, Juerg Diemand, Joachim Stadel +1
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 d…
Concentration, Spin and Shape of Dark Matter Haloes: Scatter and the Dependence on Mass and Environment
Andrea V. Maccio', Aaron A. Dutton, Frank C. van den Bosch +3
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 properti…
A Systematic Survey of Moon-Forming Giant Impacts. II. Rotating bodies
Thomas Meier, Christian Reinhardt, Miles Timpe +2
In the leading theory of lunar formation, known as the giant impact hypothesis, a collision between two planet-size objects resulted in a young Earth surrounded by a circumplanetar…
An alternative to grids and glasses: Quaquaversal pre-initial conditions for N-body simulations
Steen H. Hansen, Oscar Agertz, Michael Joyce +3
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…
Angular momentum transport and disk morphology in SPH simulations of galaxy formation
Tobias Kaufmann, Lucio Mayer, James Wadsley +2
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 ha…
Simultaneous ram pressure and tidal stripping; how dwarf spheroidals lost their gas
Lucio Mayer, Chiara Mastropietro, James Wadsley +2
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 ti…
Cusps in CDM halos
Juerg Diemand, Marcel Zemp, Ben Moore +2
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 billio…
Gone with the wind: the origin of S0 galaxies in clusters
Vicent Quilis, Ben Moore, Richard Bower
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 s…
Dark Matter Halos within Clusters
Sebastiano Ghigna, Ben Moore, Fabio Governato +3
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…
A universal velocity distribution of relaxed collisionless structures
Steen H. Hansen, Ben Moore, Marcel Zemp +1
Several general trends have been identified for equilibrated, self-gravitating collisionless systems, such as density or anisotropy profiles. These are integrated quantities which…
Density profiles and substructure of dark matter halos: converging results at ultra-high numerical resolution
Sebastiano Ghigna, Ben Moore, Fabio Governato +3
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 re…
Systematic uncertainties in the determination of the local dark matter density
Miguel Pato, Oscar Agertz, Gianfranco Bertone +2
A precise determination of the local dark matter density and an accurate control over the corresponding uncertainties are of paramount importance for Dark Matter (DM) searches. Usi…
The biasing of baryons on the cluster mass function and cosmological parameter estimation
Davide Martizzi, Irshad Mohammed, Romain Teyssier +1
We study the effect of baryonic processes on the halo mass function in the galaxy cluster mass range using a catalogue of 153 high resolution cosmological hydrodynamical simulation…